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 location 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 4V, 4.5V, 5V, 6V, 7.4V, 9V, 12V) Standby Current: 7–9mA Working Current: 70–130mA Relay Rating: 20A (14VDC, 12A; 120VAC, 7A) Maximum 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 Compatibility: Designed for computer mainframes Product 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 Notes: Momentary Mode: Press and hold to turn ON, release to turn OFF Toggle Mode: 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 Code Clearing: Press and hold the receiver’s learning button for approximately 5 seconds until the LED turns from ON to OFF. This indicates the code has been cleared. Code Learning (Momentary/Toggle Mode): Press the receiver’s learning button. The LED will flash slowly, indicating learning mode is activated. Press the transmitter button. The receiver’s LED will flash rapidly twice, then return to slow flashing—this indicates successful code learning. Press the learning button again to stop 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.