1. In sets power device, current battery (4Ah/12V), Can work in power cut. 2. It can be replace to ordinary rolling door opener no need to detaching edge board Can be connected with external illuminating lamps (Voltage: 220v, Automatic turnoff in 3 minutes). 3. Superior material: Aluminum shell, light weight and high-solidity 4. Available to set up internal and external controller(If the internal controller fails, the external controller also can open the gate). 5. Automatic rolling code function & Powerful in anti interference