Descriptions:Dual power supply (two power sources cannot be supplied at the same time): power 1, DC 6.5-25v; Power 2, DC 5V.Based on TI CC2541 chip, Support android 4.3 or above, for iPhone 4s or above (IOS8 or above) mobile control. Features:Dual power supply (two power sources cannot be supplied at the same time): power 1, DC 6.5-25V; Power 2, DC 5V.Standby current (all relay closed) 13MA,1 relay "open "44MA, 2 relay" open "76MA.Based on TI CC2541 chip, Support android 4.3 or above, for iPhone 4s or above (IOS8 or above) mobile control.Via bluetooth APP, send instructions to control relay and disconnect (we provide bluetooth APP, or you can use your own APP to control relays, and send simple instructions to control).With 5 instructions: click, self-lock, interlock, relay "open, relay" close". Specifications:Power supply 1: DC 6.5-25VPower supply 2: DC 5VSize: 7 * 5.5 * 2cm / 2.76 * 2.17 * 0.79inchWeight: 48 gPackage Included:1 x Bluetooth RelayNote:1. phone must support bluetooth 4.0, such as galaxy S4 (android 4.3),phone 4s(IOS8)2. Bluetooth 4.0 without matching, so when open bluetooth mobile phone cannot search equipment3. Without password, open software direct connection4. Baud rate is 9600BPS, Please do not modify the Bluetooth baud rate, otherwise the relay will not work