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. Suitable as a wireless relay remote control for computer mainframes. Specifications: Working Voltage: DC4V-12V (compatible with DC4V, 4.5V, 5V, 6V, 7.4V, 9V, 12V) Standby Current: 7-9mA Working Current: 70-130mA Relay Rating: 20A (14VDC, 12A; 120VAC, 7A) Max Load: 10A (recommended load under 7A) Learning Code: Equipped with a learning button to add transmitter Working Mode: Momentary or Toggle mode, selectable via jumper Compatible with: Computer mainframe 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 the image 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: Input GND (-) VCC: Input VCC (+) NC: Normally Closed COM: Common NO: Normally Open Clearing Code: Press and hold the receiver’s learning button for about 5 seconds until the LED indicator changes from ON to OFF, indicating that the code has been cleared. Learning Code Procedure (Momentary/Toggle Mode): Press the receiver’s learning button; the LED will flash slowly, indicating entry into learning mode. Press the transmitter button; the receiver’s LED will flash rapidly twice and then return to slow flashing, indicating successful 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.