or GFKS technology, LoRa (remote) spread spectrum technology Half-duplex communication Super anti-interference (channel rejection ratio: 56db) High receiver sensitivity -139dbm. multi-band, do not need to apply the frequency of free use. Multi-frequency optional, a of transmission rates. Can be used in FDMA and FM technology. Intelligent reset, low-voltage monitoring, time, low-power mode, sleep mode Low power receive current: 10-12mA 256-bit TX or RX RSSI channel detection function Transmission Mode: or Direct Mode (Recommended Packet Mode) Configuration: or Wake on Air or Low Power or Carrier Sense or FEC Error Correction or Encryption Ultra-long-distance transmission as far as 3KM open Colour:blue Material:PCandmetal type:868Mhz Package Contents: 1 x Lora Module 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.