ESP32 WIFI Bluetooth-compatible BLE Relay Module 1/2/8 Channel Power Supply Module DC 5-30/60V ESP32 WIFI BT BLE Relay Module. Feature: Powerful Integrated Functionality, Multiple Relay Outputs, Remote Control Capability, Low Power BLE Connection, Security Assurance. Specification: Origin Mainland China, Type Module, Condition New, Control chip based on ESP32 system, integrated WiFi, Bluetooth and BLE function.