GFSK technology, LoRa (long-range) spread spectrum technology Half-duplex communication Super anti-interference (channel rejection ratio: 56db) High receiver sensitivity -139dbm. Multi-band, no need to apply for frequency for free use. Multi-frequency selectable, a number of transmission rates. Can be used in FDMA and FM technology. Intelligent reset, low voltage monitoring, timing, low power mode, sleep mode Low power reception: 10-12mA 256-bit TX/RX RSSI channel detection function Transmission mode: / Direct mode (Recommended packet mode) Configuration: / Wake on Air / Low power / Carrier sense / FEC error correction / Encryption Ultra-long distance transmission up to 3KM in open areas Color: blue Material: PC + metal 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 to be slightly different from the real thing. The allowed measurement error is +/- 1-3cm.