Product Name：Holyiot-21031-nRF52805 Module

Model: Holyiot-21031
Chip: Nordic nRF52805
Size: 9 * 7 * 2.2mm
Antenna: PCB Antenna
Bluetooth Version: 5.3
Communication Distance: 0 ～ 30m
TX Power：-20dBm ～ +4dBm
Transmission speed: 2Mbps / 1Mbps
Processor: 64MHz Arm Cortex-M4
Storage size: 192KB Flash + 24KB RAM
Communication Protocol: Bluetooth Low Energy / ANT / 2.4GHz proprietary
Authentication: FCC / CE / Rohs