The main chip adopts CC2652P, a multi-protocol wireless MCU with integrated amplifier Supports Bluetooth 5.2 Low Energy, Thread, Zigbee 3.0 protocols Painless access to Home Assistant's ZHA integration or Zigbee2Mqtt plugin. You can also access HassIO in OpenWrt USB port conversion chip CP2102, in-line identification with electrostatic discharge (ESD) protection indicator: Indicates the status. After connecting the programmer or USB port, the indicator lights up Programming port & debug port: used to XDS110 or other suitable programmers, sequence is as follows Status indicator: The left indicator is a red indicator, which is connected to DIO6 of CC2652P and lights up at high level. The right indicator is green indicator, which is connected to DIO7 of CC2652P and lights up at high level. Reset button: used to reset the CC2652P chip, used to enter BOOTLOAD mode or other situations need to be reset KEY1: to DIO15, low level after pressing KEY2: to DIO14, low level after pressing USB port: for USB to serial port, the conversion chip is CP2102. SWITCH chip control: DIO28, DIO29 control. Style: B with programming line Material:plastic colour:Black Package Contents: 1 * CC2652P CC2652 USB Wireless Dongle Only the above package content, other products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.