Feature:1. Widely Compatible: This MMDVM dual hat duplex hotspot board supports for DMR, P 25, D Star and system fusions, strong compatibility.2. For RasPi: This MMDVM hotspot expansion board is suitable RasPi zero, not suitable for RasPi 4.3. 32 Bit ARM: This MMDVM hotspot module adopts 32 bits ARM processor, the RF power is up to 10mW.4. 2 Onboard ADF7021: This MMDVM hotspot module board has 2 onboard ADF7021, allowing duplex operation with 2 time slots on the DMR.5. Easy Installation: The hotspot module has a wide RF range, and it can be easily installed, saving your time and effort.Specification:Item Type: MMDVM Hotspot BoardMaterial: Printed Circuit BoardRF Power: 10mWSupport: for DMR, P25, and D Star.Package List:1 xMMDVM Hotspot Board2 x Pins