Working mode: 1. Inching mode: press the remote controltherelaywill connect, and thenrelease the remote controlto disconnect the relay. 2. Self-locking mode: press the remote controltherelaywill connect, and then press the remote controlagainto disconnect the relay. 3. Interlock mode: press the remote control key A toconnect the relay, and press the remote control key B to disconnect relay. 4. Delay mode: press the remote controltherelaywill connect, release the remote control and start timing. After 5S, 10S and 15S (3 gears), the relay will be automatically closed. Input Voltage: 12 V, RF working mode: Superheterodyne Receiver sensitivity: more than 97 dbm Transmitting distance: more than 100 m ( open space) Decoding mode: MCU software decoding Remote storage: 20 Support remote type: EV1527 learning code Working mode: Momentary, toggle, latching time delay (5s ,10s ,15s ) Output terminal: NO , NC , COM Remote control battery: 2 x 3 V CR2016 button batteries Note: Maximum input power is 12 V Remote programming Colour: transparent color Material: plastic Package Contents: 4 x Receiver module 4 x AB Type Remote Control (with battery) 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.