Comprehensive RF Communication Solution: This DFRobot Gravity Wireless Switch Transmit operates at 433MHz, ideal for various remote control applications including doorbells, automated doors, and other DIY projects. The wireless switch module using 433Mhz RF communication technology Receiver. It has the advantages of simple operation, high scalability, strong penetration, low standby power consumption, etc. It transmits digital signals and is compatible with any controller and sensor that can read and write digital signals. It can upgrade the wired button to a wireless button and deploy it as a signal acquisition node, which is suitable for designs that require wireless transmission of digital signals, such as wireless doorbells, remote controls, etc. Easy Installation & Versatility: Designed for simplicity, this kit can be easily integrated into your existing projects or used to start ones. Its versatility makes it suitable for hobbyists, educators, and professionals alike. Reliable Performance: Enjoy stable and reliable wireless communication thanks to the robust 433MHz frequency band. This frequency offers less interference and extended range, making it a dependable choice for your remote control needs. Working voltage: 3.3-5.0V DC Stable transmission distance: 15M indoors Transmitter transmission current: 10mA 5V Transmitter standby current: Less than 10uA 5V Receiver transmission current: 6mA 5V Receiver standby current: 3mA 5V Input signal: digital Number of interfaces: 4 Working frequency band: 433Mhz Color: As Shown Material: PCB Package Contents: 1 x Transmitter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.