This is a receiver with its own male and female cable, which can be directly connected to the male connector of the power supply and the female connector of the device, eliminating the trouble of wiring. Wide voltage DC3.7V-12V can be used. Input DC3.7V-12V, output DC3.7V-12V, input DC5V, output DC5V, input DC12V, output DC12V Working voltage: DC3.7V-12V wide voltage (DC3.7V 4.5V 5V 6V 7.4V 9V 12V are all possible) Length: 210mm Color: black Material: plastic+metal Connector size: male and female 5.5 x 2.1mm Working mode: MOS tube SCR silent and non-contact (control the on and off of the positive electrode VCC + ) Frequency: 433MHZ Standby & working current: 6mA Load capacity: 3A Weight: 20g Code pairing method: The receiver has a learning function, can be equipped with a remote control, and can be set for multiple sets of universal Package Contents: 1 x Receiver A 1 x Remote (2 CR2016 button batteries not included) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.