One: Overview HKW51-4S wireless module is the use of SEMTECH's latest LoRaTM modulation technology for wireless chip, the module has a long distance spread spectrum communication, high noise immunity and minimize current consumption. Use LoRaTM mode can achieve high sensitivity -148dbm and plus integrated + 20dbm of power output, PK any wireless module with the industry, the module is suitable for any environment complex wireless data transmission applications, such as: Wireless copy table, intelligent home control, automotive electronics, security alarm, industrial monitoring and control systems, remote control systems for applications such as agricultural irrigation. II: Features: 1: transmit frequency: 433MHZ (can be customized) 2: FSK / GFKS technology, LoRa (remote) Spread Spectrum Technology 3: + 20dbm output power 4: baud rate up to 300 kbps 5: high receiver sensitivity - . 139dbm 6: Low Power accepts current: 10-12mA 7: Super Immunity (channel rejection ratio: 56db) 8: ISSI channel detection function 9: Transfer Mode: FIFO / direct mode (packet mode is recommended FIFO) 10 : 256 FIFO TX / RX 11: ISM multiband, frequency does not need to apply for free use 12: intelligent reset, low voltage monitoring, timed wake-up, low-power mode, sleep mode 13: open transmission distance of up to 5KM. 14: Size: 19 * 22.4mm III: Application 1: Wireless meter reading (water, electricity, gas) 2: Wireless la carte 3: oilfield, mining, construction sites, factories and other control systems 4: industrial data acquisition, transmission intelligent control system 5: Wireless Alarm System 6: Smart Home System 7: medical, hospital call system 8: building security alarm system