HSimplex MMDVM Hotspot UHF/VHF P25 DMR YSF D-Star plus more. Running Raspberry Pi Zero 2W Has UPS Battery backup (1000mAh) Great if power goes down and you use your cell phone's internet. Running WPSD Raspberry Pi Zero 2W Pi-Star loaded on SD card you just need to configure your call and Wi-Fi and you're on the air. Features: -Simplex Hotspot -High performance 32-bit ARM processor -Supports DMR, P-25, D-Star, System Fusion, plus more -Fully tested -2 color OLED WIDELY COMPATIBLE: Supports DMR, P-25, D-Star, System Fusion, plus Modem select: STM32-DVM/MMDVM_HS-Raspberry pi Hat(GPIO) 3D Printed Case: High RF performance Antenna: standard antennaere is a nice simplex HS with a UPS battery back up