Features APPLICABLE MODEL: MMDVM hotspot board supports USB duplex large board, mmdvm duplex board, mmdvm duplex hotspot. STABLE PERFORMANCE: The MMDVM hotspot board is circuit tantalum capacitor filtered for stable operation and can be turned on 7 x 24 hours. NO BIAS: The MMDVM hotspot board uses an excellent temperature complementary crystal with no bias frequency. STRONG COMPATIBILITY: MMDVM hotspot board supports B+, 2B, 3B, 3B+, 4B, etc., organic light emitting diode screen and serial Nextion screen. 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 Module2 x Accessories1 x Screen Board Package List 1 x Module 2 x Accessories 1 x Screen Board