Features:

Repeater and Simplex mode change anytime , through change the RX/TX board line order.
Support MMDVM mode DMR/YSF/P25/NXDN/DSTAR/POCSAG
Double timeslot in DMR mode, act as a mini Digital voice repeater.
Support VHF/UFH, frequency range: depends on your external radio.
High-quality ECS TCXO, stable with low BER.
Support Raspberry Pi 3B, 3B+, Pi ZERO, Compatible with NanoPi NEO, Orange Pi, Compatible to BlueDV(Required to add USBtoTTL or Bluetooth model)
With USB interface ,can connect to Raspberry Pi and PC, inner PL2303 model.
Upgrade through ST-Link, USB, GPIO, continue upgrade support.

Including && components
1x PCB with complete soldering,
1x PS/2 6Pins Data cable
1x Motorola Linker,(suit to GM300/M120/GM338/GM3188/CDM1250/GM340/GM950)

Options:
USBtoTTL adapber.

Shipping info:
There are difference shipping channel for difference area, please check here for detail
https://www.bi7jta.org/cart/index.php?route=information/information&information_id=6

Specs and Docs:
Power require: 5V2A
MCU: STM32F105RBT
TCXO: 19.2MHz
HAT: 1.6mm thick,unleaded process
Interface: MicroUSB, GPIO, PS/2

https://www.st.com/en/microcontrollers/stm32f103c8.html
http://www.analog.com/media/en/technical-documentation/data-sheets/ADF7021.pdf
http://wiki.friendlyarm.com/wiki/index.php/NanoPi_NEO

Warning:
Be sure to use a qualified power supply 5V2A, non-conforming power will lead to bit error rate(BER) instability, Overvoltage will burn this NanoPi and HAT！

After sales and support:
See also [About us]
https://www.bi7jta.org/cart/index.php?route=information/information&information_id=4