Fangrui Product Details / Gfks Technology, Lora (remote) Spread Spectrum Technology Half-duplex Communication Super Anti-interference (channel Rejection Ratio: 56db) High Receiver Sensitivity -139dbm. Ism Multi-band, Do Not Need To Apply The Frequency Of Free Use. Multi-frequency Optional, A Variety Of Mission Rates. Can Be Used In Fdma And Fm Technology. Intelligent Reset, Low-voltage Monitoring, Wake-up Time, Low-power Mode, Sleep Mode Low Power Receive Current: 10-12ma 256-bit Tx / Rx Rssi Channel Detection Function Mission Mode: / Direct Mode (recommended Packet Mode) Configuration: Afc / Wake On Air / Low Power / Carrier Sense / Fec Error Correction / Encryption Ultra-long-distance Mission As Far As 3km Open Colour:blue Material:pc+metal Type:915mhz 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- Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.