Features 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. Features: 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. Specifications: Working Voltage: DC4V 12V(DC4V 4.5V 5V 6V 7.4V 9V 12V) 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 Size: Approx. 43 x 30 x 22mm / 1.69 x 1.18 x 0.87inch Remote Size: Approx. 60 x 30 x 12mm / 2.36 x 1.18 x 0.47inch Quantity: 1PC Package Weight: 50G Package Included: 1 x Relay Remote Control Switch 1 x Transmitter (Other items in the picture are not included) Momentary----Press and Hold----ON, Release----OFF Toggle----Press one time----ON. Press it again----OFF GND----Input GND - VCC----Input VCC + NC----Normally Close COM----Common NO----Normally Open Clearing Code: Press the receiver learning button and hold for about 5s until the receiver LED indicator from ON to OFF, it means the code have been cleared. Learning Code: Momentary/Toggle Mode: Press the receiver learning button, the receiver LED indicator flash slowly, it means entering into learning state, press the transmitter button, the receiver LED indicator flash fast for 2 times and then flash slowly, it means learning is successful. Press the learning button again to turn off the LED indicator, it means learning is finishe Package List