Feature:1. Simple, convenient and ready-to-use multi-mode hotspot module supports D-STAR / P25 / Digital mobile radio.2. Combined with for Raspberry Pi 3 and for Raspberry Pi 0 W, hotspot board supports wide application.3. Hotspot module can support D-STAR, P25, Digital mobile radio and UHF or VHF modes.4. Made of high quality material, wireless hotspot board keeps high durability and long service life.5. In simple structure and convenient design, hotspot board is easy to install.Specification:Item Type: Wireless hotspot boardBasic Setting: 433.5550000MHZ Digital mobile radioWIFI SSID: GARY / PASSWORD: (Since for Pi 0 W does not support 5.8GHz, 2.4GHz SSID is required)Software: PI-STARPower Supply: Use the Micro USB for Android data cable to connect the mobile phone charger or the computer USB port to supply power. If you use it outdoors or in the car, please turn on the mobile phone hotspot to provide network use for the data hotspot.Optional Style: Model A, Model B, Model CModel A: Single Hotspot Expansion Board + AntennaModel B: Single Hotspot Expansion Board+Organic Light-Emitting Diode Screen+ AntennaModel C: Single Hotspot Expansion Board + Organic Light-Emitting Diode Screen + Shell + Antenna.Package List:1 x Hotspot Board1 x Organic Light-Emitting Diode Screen1 x Shell1 x Antenna Accessory BagNote:1. All designs will be provided in the Multi‑Mode Digital Voice Modem open source project.2. Does not support analog radio USB.3.Please note that the product needs to be welded and assembled by itself.