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, allowing control of the receiver from any place within a reliable distance. The unit is compact, with stable and reliable performance and high receive sensitivity. Applications include automatic doors, windows, lifting equipment, entrance access systems, and more. Ideal wireless relay remote control for computer mainframes. Specifications: Working Voltage: DC 4V12V (compatible with DC 4V, 4.5V, 5V, 6V, 7.4V, 9V, 12V) Standby Current: 79mA Working Current: 70130mA Relay Rating: 20A (14VDC), 12A (120VAC), 7A Max Load: 10A (recommended load less than 7A) Learning Code: Learning button to add transmitter Working Mode: Momentary or Toggle mode, selectable via jumper Compatibility: Designed for computer mainframes Size: Approx. 43 x 30 x 22mm / 1.69 x 1.18 x 0.87 inch Remote Size: Approx. 60 x 30 x 12mm / 2.36 x 1.18 x 0.47 inch Quantity: 1 piece Package Weight: 50g Package Included: 1 x Relay Remote Control Switch 1 x Transmitter (Other items shown in images are not included) Operation Modes: Momentary: Press and hold to turn ON, release to turn OFF Toggle: Press once to turn ON, press again to turn OFF Terminal Definitions: GND Ground input VCC Power input NC Normally Closed COM Common NO Normally Open Clearing Code: Press and hold the receivers learning button for about 5 seconds until the LED changes from ON to OFF. This indicates the codes have been cleared. Learning Code (Momentary/Toggle Mode): Press the receivers learning button. The LED will flash slowly, indicating it is in learning mode. Press the transmitter button. The receivers LED will flash rapidly twice and then return to slow flashing, indicating successful code learning. Press the learning button again to turn off the LED, completing the process. Note: Please note that new and old versions of this product may be shipped randomly. Ensure you are comfortable with this before placing your order.