--- product_id: 44165400 title: "HC-05 Wireless Bluetooth RF Transceiver Master Slave Integrated Bluetooth Module 6 Pin Wireless Serial Port Communication BT Module for Arduino" brand: "hiletgo" price: "HK$141" currency: HKD in_stock: true reviews_count: 13 url: https://www.desertcart.hk/products/44165400-hc-05-wireless-bluetooth-rf-transceiver-master-slave-integrated-bluetooth store_origin: HK region: Hong Kong --- # 3.6V-6V power input 10m+ wireless range Master/Slave dual mode HC-05 Wireless Bluetooth RF Transceiver Master Slave Integrated Bluetooth Module 6 Pin Wireless Serial Port Communication BT Module for Arduino **Brand:** hiletgo **Price:** HK$141 **Availability:** ✅ In Stock ## Summary > 🚀 Elevate your Arduino game with wireless freedom! ## Quick Answers - **What is this?** HC-05 Wireless Bluetooth RF Transceiver Master Slave Integrated Bluetooth Module 6 Pin Wireless Serial Port Communication BT Module for Arduino by hiletgo - **How much does it cost?** HK$141 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/44165400-hc-05-wireless-bluetooth-rf-transceiver-master-slave-integrated-bluetooth) ## Best For - hiletgo enthusiasts ## Why This Product - Trusted hiletgo brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Compact & Lightweight:** At just 3.5g and 37.3x15.5mm, it fits perfectly into any DIY or professional setup without bulk. - • **Dual Mode Flexibility:** Switch between master and slave modes to connect with a wide range of Bluetooth 2.0 devices, expanding your project’s versatility. - • **Instant AT Command Access:** Enter AT mode with a simple button press to customize settings and optimize performance on the fly. - • **Reliable Serial Communication:** Supports standard 9600 baud rate with full duplex serial port communication—no complex Bluetooth protocols needed. - • **Seamless Bluetooth Integration:** Add wireless control to your Arduino projects effortlessly with HC-05’s plug-and-play design. ## Overview The HiLetgo HC-05 Bluetooth Module is a compact, lightweight wireless transceiver designed for Arduino projects. Operating at 3.6V to 6V, it supports both master and slave modes, enabling flexible Bluetooth 2.0 device connections. With a reliable 10-meter transmission range and easy AT command configuration, it offers seamless serial communication at 9600 baud rate, making it an essential tool for adding wireless control to your DIY electronics. ## Description Module parameters: 1.PCB Size: 37.3mm (Long) *15.5mm (wide) 2. Weight: 3.5g 3. Input voltage: 3.6V--6V, prohibit exceeding 7V 4. Leads 6 feet: EN/VCC/GND/RXD/TXD/STATE (Bluetooth state leads, not connected output low level, the output high level after connection) 5. With the connection status indicator, LED flash indicates no Bluetooth connection; Led slow flash indicates enter at command mode 6. On-board 3.3V voltage regulator chip, input voltage DC 3.6V-6V; When not paired, current about 30mA (due to LED lights flashing, current in the state of change); After the pairing succeeds, the current is about 10mA 7. Effective transmission distance of 10 meters in open area, more than 10 meters is possible, but not to ensure the quality of the connection 8. After pairing succeeds, can be used as full duplex serial port. No need to understand any Bluetooth protocol, but only support 8-bit data bits, 1-bit stop bits, no parity communication format. This is also the most commonly used communication format, does not support other formats! 9. Press the key and then power up the Bluetooth module to enter at mode, set parameters and query information 10. Can switch host and machine mode from at command 11. The module default baud rate is 9600, the default pairing password is 1234, the default name is HC-05 Wiring method: VCC: Connect the power supply positive GND: Connecting the cathode RXD: The receiver, the Bluetooth module receives data from other devices, and the sending end TXD of the other devices normally TXD: Send end, Bluetooth module sends data to other equipment; the receiving end RXD of the other equipments normally En: To enable the end, need to enter the at mode when 3.3V Note: this item doesn't works with iOS. Package included: 1* HC-05 6 Pin Wireless Bluetooth RF Transceiver Module Serial BT Module for Arduino ## Features - The factory setting is slave mode, but you can set this module to master mode so that you might be able to connect to other Bluetooth 2.0 devices.HC-05 Wireless BT Module - HC-05 Wireless BT Module: with this HC 05 Bluetooth module,You can quickly add the Bluetooth feature to your Arduino project, and then you can use your android phone to control some gadgets, such as: switch, LED. - Master and Slave 2-IN-1 HC 05 Module:Working Voltage 3.6V to 6V , Default baud rate:9600,Default pin:1234 - Button: Press the button, the module enter the AT mode. AT commands are executed only in AT mode. - 6 PIN Dopunt Cable : with this Dupont Cable, you can easily connect this HC-05 Bluetooth module to your Arduino Board ## Technical Specifications | Specification | Value | |---------------|-------| | Asin | B071YJG8DR | | Best Sellers Rank | #155 in Bluetooth Network Adapters | | Brand | HiLetgo | | Color | 1pc | | Compatible Devices | Desktop | | Customer Reviews | 4.4 4.4 out of 5 stars (385) 4.4 out of 5 stars | | Data Link Protocol | Bluetooth | | Data Transfer Rate | 9600 bits_per_second | | Hardware Interface | Bluetooth | | Item Weight | 3.5 g | | Manufacturer | HiLetgo | | Mfr Part Number | 3-01-1291-UK-1PC | | Model Number | 8541554474 | | Number Of Items | 1 | | Number Of Packs | 1 | ## Product Details - **Brand:** HiLetgo - **Color:** 1pc - **Compatible Devices:** Desktop - **Data Link Protocol:** Bluetooth - **Data Transfer Rate:** 9600 bits_per_second - **Hardware Interface:** Bluetooth - **Item Weight:** 3.5 g - **Manufacturer:** HiLetgo - **Number of Items:** 1 - **Number of Packs:** 1 ## Images ![HC-05 Wireless Bluetooth RF Transceiver Master Slave Integrated Bluetooth Module 6 Pin Wireless Serial Port Communication BT Module for Arduino - Image 1](https://m.media-amazon.com/images/I/612CH8mJu-L.jpg) ![HC-05 Wireless Bluetooth RF Transceiver Master Slave Integrated Bluetooth Module 6 Pin Wireless Serial Port Communication BT Module for Arduino - Image 2](https://m.media-amazon.com/images/I/61fIAm4r6tL.jpg) ![HC-05 Wireless Bluetooth RF Transceiver Master Slave Integrated Bluetooth Module 6 Pin Wireless Serial Port Communication BT Module for Arduino - Image 3](https://m.media-amazon.com/images/I/61dlsAhhjmL.jpg) ![HC-05 Wireless Bluetooth RF Transceiver Master Slave Integrated Bluetooth Module 6 Pin Wireless Serial Port Communication BT Module for Arduino - Image 4](https://m.media-amazon.com/images/I/71xYTVQNw1L.jpg) ![HC-05 Wireless Bluetooth RF Transceiver Master Slave Integrated Bluetooth Module 6 Pin Wireless Serial Port Communication BT Module for Arduino - Image 5](https://m.media-amazon.com/images/I/61ts-+uwk0L.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ No issues, works. *by on Reviewed in the United States June 18, 2026* Nice bluetooth module, no issues ### ⭐⭐⭐⭐⭐ Very good device, but not simple to get it operation correctly. *by on Reviewed in the United States March 10, 2019* After searching through the web on how to use the HC-05, I ordered a few for a project. Eventually, I got the project working smoothly on an Arduino Uno. I designed a printed circuit board for a shield and have made several units. All work well.That is the good news. The bad news is it helps to be an electrical engineer with experience in embedded design. The various web sites were helpful, but most had errors. For example, some circuits did not use a level shifter for driving the RxD input or reading from TxD. Some level shifters are wired wrong and the choice of circuit can even slow down the fastest baud rates. Some Arduino Uno baud rates are not good choices because of clock frequency errors. If you run the HC-05 using hardware serial on an Uno, you have to pull the HC-05 out to program the Uno.Other websites either do not seem to understand the two modes of HC-05 operation, or at least they describe the poorly. One mode (power up while holding the button) enables a configuration mode that must be run at 38,400 Baud. After configuration, the other mode (for data transfer) runs at whatever baud rate was selected during configuration. My project actually lets the Uno power up the unit in the configuration mode, checks the configuration, then cycles the power to restart in the data transfer mode. Don't reconfigure the device every time you use it. That will probably burn out the nonvolatile memory that holds the parameters.Finally, Bluetooth itself can be tricky. I found that Windows 7 and Windows 10 can be finicky about connecting and disconnection with a Bluetooth device.Good luck with your project. It may take some effort to get everything working. So far, the modules, themselves, have all worked properly once I got the hardware and software designed properly. ### ⭐⭐⭐⭐ Easy to plug in from hardware to software *by on Reviewed in the United States June 19, 2020* I enjoyed how easy it was to plug into my Arduino Mega and Nano, however this product only allowed the use of Androids and not iPhones. There are other Bluetooth modules that can connect to iPhones. ## Frequently Bought Together - HiLetgo HC-05 Wireless Bluetooth RF Transceiver Master Slave Integrated Bluetooth Module 6 Pin Wireless Serial Port Communication BT Module for Arduino - ELEGOO 120pcs Multicolored Dupont Wire 40pin Male to Female, 40pin Male to Male, 40pin Female to Female Breadboard Jumper Ribbon Cables Kit Compatible with Arduino Projects - Arduino Uno REV3 [A000066] --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hk/products/44165400-hc-05-wireless-bluetooth-rf-transceiver-master-slave-integrated-bluetooth](https://www.desertcart.hk/products/44165400-hc-05-wireless-bluetooth-rf-transceiver-master-slave-integrated-bluetooth) --- *Product available on Desertcart Hong Kong* *Store origin: HK* *Last updated: 2026-09-06*