Features 1、[Bluetooth Proximity Switch Module] Using high performance Bluetooth module, ensuring the communication capability and stability. Capable of adapting to DC input voltages ranging from 5V to 35V, suitable for various power supply environments. 2、[Multi Voltage Regulator Design] Equipped with multiple voltage regulators to ensure stable working under different input voltages. 3、[Automatic Bluetooth Sensing] Automatically detects when the phone approaches, enabling touchless switch control. 4、[Direct Bluetooth Connection] Connect directly via phone Bluetooth function without the need for additional APP installation. 5、[Versatile Configuration Options] Supports parameter configuration through various methods such as APP, mini program, or serial port for flexible settings. 6、[AT Command Programming] Reserve UART interface, support to modify switch lock signal value, switch lock mode and switch duration through AT command, increase module programmability. 7、[Real Time Control] The relay automatically turns on after connecting via Bluetooth on the phone, and automatically turns off after disconnecting Bluetooth, achieving real time control of the output voltage. Specification Item Type: Bluetooth Proximity Switch Relay Module Material: PCB Power Supply: DC5-35V Package List 1 x Bluetooth Proximity Switch Relay Module 1 x 4P Single Pin