BK7238 single relay development board is equipped with WB3S WiFi Bluetooth module, I/O ports are fully led out, and supports multiple power supply methods such as AC90-250V/DC7-12V/USB5V A low-power embedded Wi-Fi + Bluetooth LE dual protocol module developed by Tuya Smart. It consists of a highly integrated wireless RF chip BK7238 and a small number of peripheral devices, with built-in Wi-Fi network protocol stack and rich library functions Built-in low-power 32-bit CPU can also as an application processor Remote access: This development board uses seamless remote control, allowing you to manage devices from anywhere Flexible integration: Designed for developers and hobbyists, it is ideal for creating customized smart home solutions. Its wireless capabilities easy integration into your existing home network Wi-Fi connectivity: 802.11 b/g Channel 1-14@2.4GHz Supports , WPA/WPA2, WPA/WPA2PSK(), WPA3 security mechanisms Maximum output power of +16dBm in 802.11b mode Supports SmartConfig function (including Android and iOS devices) Onboard PCB antenna, antenna gain 1.5dBi Operating temperature: -40 to 85 Bluetooth LE: Supports low-power Bluetooth (V4.2) Maximum output power +6dBm Onboard PCB antenna, antenna gain 1.5dBi Colour:blue Material:PCB Package Contents: 1 * Relay Module Kit 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.