/ GFKS technology, LoRa (remote) spread spectrum technologyHalf-duplex communicationSuper 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 modeLow power receive current: 10-12mA256-bit TX / RXRSSI channel detection functionTransmission Mode: / Direct Mode (Recommended Packet Mode)Configuration: / Wake on Air / Low Power / Carrier Sense / FEC Error Correction / EncryptionUltra-long-distance transmission as far as 3KM openColour:blueMaterial:PC+metaltype:868MhzPackage Contents:1 x Lora ModuleOnly 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.