1、The relay possess long service life, which can be connected continuously for 100,000 times 2、Bluetooth relay module come with wireless control function, convenient control and operation 3、Provide diode effusion protection, short response time, therefore bring high efficiency 4、Includes 2 channel 5V/10A relay module and for SPP‑C Bluetooth serial port slave module 5、Wireless remote control, you can send instructions through the mobile phone APP to control the switch of the relay Item Type: Bluetooth Relay Module Material: PCB Control Distance: Approx. 10meter / 32.8ft(open environment) Purpose: Includes 2 channel 5V/10A relay module and for SPP-C Bluetooth serial port slave module, which can control the switch of the relay by sending instructions through the mobile phone APP 1 x Bluetooth Relay Module