It is a learning code wireless remote control switch(receiver). It is easy to match the transmitter(remote control). Strong signal which can pass through walls, floors and doors, control receiver from any place within a reliable distance. The volume is small and the performance is stable and reliable, high receive sensitivity. It covers application ranging from like auto door, window, lifting equipment, entrance access, etc. Perfect wireless relay remote control for computer mainframe. Standby Current: 7-9mA Working Current: 70-130mA Relay Standard: 20A( 14VDC 12A 120VAC 7A) Max Load: 10A (better load is less than 7A) Learning Code: Learning Button to add Transmitter Working Mode: Momentary Toggle adjusted by Jumper Compatible: For computer mainframe Colour:Photo Color Material:plastic Package Contents: 1 x Relay Remote Control Switch 1 x Transmitter 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.