Opening method : Password, Digital Key Appearance - Front body : 66(W)x174(H)x20(D)(mm) - Main body : 154(W)x93(H)x37(D)(mm) - Material : Front body-Aluminium Alloy,ABS,Polycarbonate Main body-Aluminium Alloy, ABS Operation Power : 4 numbers of 1.5 V Alkaline battery sized AA Lifetime of Battery:12 months(20 times/a day in regular, It depends on temperature, humidity and oftenness.)
