2 Transmitter + 12V 4CH Channel Relay RF Wireless Remote Control Switch Receiver 4CH Channel 443MHz Wireless RF Remote Control Relay Switch With 2 Receiver Features: - Long Range: Signal can pass through walls, floors, and doors, allowing stable control of the receiver from any location within a reliable distance. Maximum range up to 98ft/30m in open area without obstacles. - 4CH for More Control: Adjustable operation modes support control of equipment for forward/reverse, on/off functions. Supports self-lock, momentary (jog), and inter-lock switching modes. - Security Control: Rolling code technology provides high-level security with low repetition rate. Re-learn function allows deletion of lost remote codes and pairing of new ones, ensuring authorized control. - Easy to Use: Simple setup, easy code learning and relearning process. Stable performance with high receiving sensitivity. - Wide Application: Suitable for a variety of applications including garage doors, gates, windows, lighting systems, alarms, and industrial equipment. 4CH Channel 443MHz Wireless RF Remote Control Relay Switch With 2 Receiver Specifications: - Receiving Frequency: 443.92MHz - Receiver Sensitivity: 105dB - Max Load Current: 20A - Remote Control Distance: 30M - Operating Voltage: DC 12V - Frequency: 443.92MHz - Operating Current: 13mAh Package Includes: 2 x Remote Controls 1 x Relay Receiver