telemetry kit 433mhz 3dr wireless radio compitible for apm1 apm2 2.5 ardupilot

Ad details

" very small size
light weight under 4 grams without antenna
433 434.79mhz
receiver sensitivity to 121 dbm
transmit power up to 20dbm 100mw
transparent serial link
air data rates up to 250kbps
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 percent data bit errors
demonstrated range of several kilometers with a small omni antenna
can be used with a bi directional amplifier for even more range
open source firmware
at commands for radio configuration
rt commands for remote radio configuration
adaptive flow control when used with apm
based on hm trp radio modules, with si1000 8051 micro controller and si4432 radio module"