Feature: 1. Ultra low power consumption, high sensitivity response, RF remote control switch, can pass through the wall. 2. Free setting of 3 working modes, convenient for users to use for different control functions. 3. This is a remote controller without shell and buttons, reliable, practical, and durable. 4. The EV1527 transmitter module with decoding can be used to control the remote controller with other devices. 5. Input DC3V‑12V electricity to the transmission module, that is the transmission signal. 6. Used for learning receiver, can be used in smoke sensing, or other induction settings, or other microcontrollers. Specification: Condition: brand new Item Type: Transmitter receiver module Material: Plastic Color: As pictures shown Working Voltage: DC3V-DC12V Modulation Method: ASK Quiescent Current: 0 uA Working Current: 8-10ma Transmitting Power: 35-50mW Launch Distance: Approx.100-300m/328.1-984.3ft Module Parameters Quiescent Working Current: 0.6ma (ultra-low standby current) Relay Pull-In Current: 30ma Working Frequency: 433.92MHZ Size: Approx.21x11x9mm/0.83x0.43x0.35in (ultra-small size) Coding Method: Learning type, add/clear remote control through learning point Working Mode: Inching, self-locking, interlocking . Package List: 1 x Transmitter Module1 x Receiver Module