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 4V–12V (compatible with DC 4V, 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 less than 7A) Learning Code: Learning button to add transmitter Working Mode: Momentary or Toggle mode, selectable via jumper Compatible with 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 in the picture 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. This indicates the code has been cleared. Learning Code (Momentary/Toggle Mode): Press the receiver’s learning button. When the LED indicator begins to flash slowly, the receiver is in learning mode. Press the transmitter button. When the receiver’s LED flashes rapidly twice and then resumes slow flashing, learning is successful. Press the learning button again to turn off the LED indicator, completing the process. Note: The new or old version of this product may be shipped randomly. Please ensure you are comfortable with this before placing your order.