Features EASY MATCH:It is a learning code wireless remote control switch(receiver). It is easy to match the transmitter.And they can work fine with your device SUPEIOR CONTROL PERFORMANCE: Strong signal which can pass through walls, floors and doors, control receiver from any place within a reliable distance.the RF remote control adopts RF technology, stable signal. Signal of the wireless RF switch can pass through walls, floors and doors, steadily control receiver from any place within a reliable distance, Max range is up to 50 meters with no obstacle. STABLE CONNECTION: The volume is small and the performance is stable and reliable, high receive sensitivity. WIDELY APPLICATION: It covers application ranging from like auto door, window, lifting equipment, entrance access, etc.lamps, relays, remote controller, circuit boards,trumpet, power switch,home wireless control and security industry and battery powered on/off for small devices, etc. and other fields. 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 finished. Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering. Package List