... , reset by key, long standby, flexible assembly, simultaneously protecting 2 articles, compatible with any electronic sensors from our factory, etc ... 5022 Alarm 1. Product size: 11.5x4.2x2.4Cm 2. Weight: 40g (battery not included) 3. Electronic sensor signal input: Standard RJ11 ... Optional 5. Alarm volume: 85-105db 6. Battery power supply: 1 pc of 9V battery 7. Exterior power supply adapter: DC 6V ...