1-channel voice relay module with onboard microphone, amplifier speaker, 3 function buttons, extended 4G interface, extended OLED screen interface, and one 10A relay. TYPE-C interface: rechargeable, program burning. Extended 4G interface: with extension IO, expandable 4G module, 0.96-inch OLED, etc. Built-in microphone amplifier, voice conversation, clear voice, and sensitive conversation. Speaker interface: connect to 1.25 interface speaker, regardless of positive and negative poles<br><br>Extension interface: according to the silk screen next to the interface, it can be connected to OLED or 4G module Power switch: main power switch. BOOT: when the main control is just started, to force network configuration operation. After the main control is started, as a chat wake-up button Relay: call Xiaozhi "turn on the switch", "turn off the switch", "check the switch status" to realize relay control. Color: Green Material: PCB+Components<br><br>Package Contents: 1 * Voice relay module 1 * Speaker<br><br>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.