Feature: 1. Mini MMDVM Hotspot: Achieve nationwide interconnectivity with ordinary digital radios and solve the distance limitation of normal digital communication. Easy to use with for pi star system. 2. Imported Components: MMDVM boards use imported components and temperature compensated crystal oscillators, ensuring stable performance and low error rates over long periods of operation. 3. Optimized Layout: The MMDVM boards features optimized wiring, perfect component layout, lower heat generation, and fast heat dissipation, suitable for continuous operation. 4. DMR Calibration: Each board is meticulously tuned with DMR as the reference standard, ensuring stable operation with improved audio quality. Compatible with for DMR, for D Star, for YSF, for P25, for NXDN, and for POCSAG modes. 5. Easy Carrying: Mini MMDVM device features 20mW power output with a compact 86mm x 38mm x 33mm size and a 0.96 inch organic LED screen. Specification: Item Type: MMDVM Duplex Hotspot Board Material: Acrylic, PCB Frequency: U band (420.000 to 434.900, 438.100 to 470.000) Supported Modes: DMR, D Star, YSF (C4FM), P25, NXDN, POCSAG Power: 20mW Shell Material: Acrylic Size: Approx. 86mm x 38mm x 33mm / 3.39in x 1.50in x 1.30in Screen: 0.96 inch organic LED Power Supply External: MINI (for Android) Port, Type C Port 5V 2A (power supply not included) Memory Card: 16GB memory card (shipped with memory card) for Pi Board: for Zero W Hotspot Board: Duplex. Package List: 1 x MMDVM Duplex Hotspot Board