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 steady 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 turn/reverse, on/off functions. Supports self-lock, jog, and inter-lock switching modes. - Security Control: Learning code technology provides high-level security with low repetition rate. Re-learn function allows deletion of lost remote codes and programming of new ones, ensuring continued control. - Easy to Use: Simple setup, learning, relearning, and operation. Offers stable and reliable performance with high receiving sensitivity. - Wide Application: Suitable for a broad range of applications from basic home automation to industrial control systems, including windows, gates, garage doors, alarm systems, lifting equipment, and more. Specifications: - Receiving frequency: 443.92MHz - Receiver sensitivity: 105dB - Max load current: 20A - Remote distance: 30M - Operating voltage: DC 12V - Frequency: 443.92MHz - Operating current: 13mAh Package Includes: 2 x Remote Control 1 x Relay