Features:
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: 144MHz-148MHz, 420MHz-475MHz,842MHz-950MHz (depend on ADF7021 and TCXO, HAT's Firmware Amateur radio brand license limit)
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)

Including && components
1x PCB with complete soldering,
2x ANTs 5CM length,
1x 4PINs header connect to Nextion LCD

The default  antenna is black color with 5CM length, the silver Alloy Case use white color antenna. If you need other lengths, please leave me a message.

Options:
See the components for detail.

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: STM32F103C8T6
Transceiver IC: ADF7021,Programmable output power: -16dBm to +13dBm
TCXO: ECS 14.7456MHz,±2.5 ppm
HAT: 1.6mm thick,unleaded process

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