3DR 500MW Radio Telemetry 433Mhz Air and Ground Data Transmit Module for

Very small size,light weight
915Mhz frequency band    433Mhz frequency band
Receiver sensitivity to -117 dBm
Transmit power up to 20dBm (100mW)
Transparent serial link
Air data rates up to 250kbps
Range of approx 1 mile with supplied antennas
Demonstrated range of several kilometers with a small omni antenna
Can be used with a bi-directional amplifier for even more range
MAVLink protocol framing and status reporting
Frequency hopping spread spectrum (FHSS)
Adaptive time division multiplexing (TDM)
Support for LBT and AFA
Configurable duty cycle
Built in error correcting code (can correct up to 25% data bit errors)
Open source firmware
AT commands for radio configuration
RT commands for remote radio configuration
Adaptive flow control when used with APM
Based on the HopeRF HM-TRP radio module, featuring an SiLabs Si1000 RF microcontroller.

Specification:
Item Name: 3DR Radio Telemetry Module
Band: 433MHz
Antenna connectors: RP-SMA connector
Power: 500mw
Sensitivity: -117dBm sensitivity
Interface: Standard TTL UART
Connection status: LED indicators
Net weight: 63g
RadioTelemetry Air Module Dimension: 51*30*10mm/12g
RadioTelemetry Ground Module Dimension: 70*25*12mm/15g

Package Included:
1 X Radio Telemetry base station (USB Connection)
2 X 500mw Radio Telemetry 433mhz
1 X lead set
2 X Antenna