Features: 1. APPLICABLE MODEL: MMDVM hotspot board supports USB duplex large board, mmdvm duplex board, mmdvm duplex hotspot. 2. STABLE PERFORMANCE: The MMDVM hotspot board is circuit tantalum capacitor filtered for stable operation and can be turned on 7 x 24 hours. 3. NO BIAS: The MMDVM hotspot board uses an excellent temperature complementary crystal with no bias frequency. 4. STRONG COMPATIBILITY: MMDVM hotspot board supports B+, 2B, 3B, 3B+, 4B, etc., organic light emitting diode screen and serial Nextion screen. 5. GOOD EFFECT: MMDVM hotspot board of C4FM, P25 is very effective, stable performance, small but powerful. Specification Item Type: Mmdvm Duplex Hotspot Board Material: PCB Features: MMDVM hotspot board support USB duplex large board, MMDVM duplex board, MMDVM duplex hotspot Mini Relay MMDVM: Support UHF, VHF, 800M Support 400M, 100M, 800M Package List 1 x Module<div>2 x Accessories</div><div>1 x Screen Board</div>