Feature: 1. 2-Channel Relay: The built-in 2-channel relay module can be activated continuously 100,000 times and has a long service life. 2. Short Response Time: Equipped with diode outflow protection, this relay has a short response time to ensure real-time remote control. 3. Main Use: Used to send instructions via mobile phone and control the relay switch of electronic equipment. 4. Light Indicator: Equipped with Bluetooth status indicator and relay indicator, you can clearly see the relay status, which is convenient for subsequent troubleshooting. 5. 10 Meters Distance: When carried on a mobile phone, the maximum stable transmission distance can reach 10 meters, which is very convenient. 6. Advanced Technology: Includes an 8-bit microcontroller chip and SPP C for Bluetooth 2.1 slave module, providing Bluetooth relay control APP. Specification: Item Type: Relay Module Material: PCB Control Distance: 10M (Open environment). Package List: 1 x Relay Module