1. Can combine for 3 and for Zero W 2. Supported modes: D-STAR, P25, DMR and UHF or VHF 3. Basic settings: 433.550000MHZ DMR 4. WIFI SSID: GARY/PASSWORD: (2.4GHz SSID is required as Pi Zero W does not support 5.8GHz) 5. Professional installation is required to avoid product damage. Software:PI-STAR Power Supply:You Can Use A Micro-Usb Android Data Cable To Connect To A Mobile Phone Charger Or Computer Usb Port For Power Supply. If Used Outdoors Or In A Car Environment, Please Turn On The Mobile Hotspot To Provide Network Access To The Data Hotspot. Tips:All Will Be Provided In The Open Source Project. Note: Analog Radio Usb Is Not Supported Note:Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Will Not Affect The Use Colour:As Shown Material:PCB+Plastic+Metal Package Contents: 1 * Single Hotspot Expansion Board 1 * Oled Screen 1 * Casing 1 * Antenna 2 * Pin Header 1 Set * Screw Installation Package Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.