News: GS68 publish begin 2019-6-25, with STM32F446, FOX 12MHz TCXO, DB9 interface, 4PIN header for Nextion , higher performance . With DB9 cable Features: GS68 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. Specs and Docs: Power require: 5V2A Color: green Material: metal + pc MCU: STM32F105RBT TCXO: 19.2MHz HAT: 1.6mm thick,unleaded process Interface: Micro-USB, GPIO, PS/2 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 Package Contents: 1 * motherboard 2 * expansion boards 2 * 6Pins data lines Only the above package content, other products are not included. Note: Light shooting 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.