Product Name：Holyiot-14015-nRF51822 Module

Model: Holyiot-14015
Chip: Nordic nRF51822
Size: 19.8 * 15 * 1.9mm
Antenna: PCB Antenna
Bluetooth Version: 4.2 / 4.0
Communication Distance: 0 ～ 100m
TX Power：-20dBm ～ +4dBm
Transmission speed: 2Mbps / 1Mbps / 250kbps
Processor: 32-bit ARM Cortex M0 processor
Storage size: 256/128KB Flash + 32/16KB RAM
Communication Protocol: Bluetooth Low Energy / ANT / 2.4GHz proprietary