Bluetooth Proximity Switch Single-Channel 30A Relay Module, Sensor Switch, Unlock with Phone Approa Bluetooth proximity switch with auto-sensing capability, allowing the relay to turn on automatically when connected to a mobile phone's Bluetooth and turn off when disconnected. Supports a wide DC input range of 5V-32V, making it versatile for various applications. Configurable mini-program parameters, enabling users to modify the module's name and password for enhanced security. Adjustable relay on/off time, providing flexibility in controlling the relay operation duration. Reserved UART pins for UART configuration, allowing advanced users to customize settings further. The Bluetooth proximity switch single-channel 30A relay module is designed for seamless integration with mobile devices. It features an onboard multi-type voltage regulator, ensuring stable performance across a broad voltage range. Users can easily configure the module through a mini-program, adjusting parameters such as relay timing and operational distance. This module is ideal for automation projects, smart home applications, and remote control systems, providing a reliable solution for wireless relay control. Color: Blue Material: PCB Package Contents: 1* Bluetooth Proximity Switch 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.