GoolRC 3DR 915Mhz Radio Telemetry Wireless Transmission Module with Protective Shell for Quadcopter Multirotor APM APM2.5 2.5.2<br /><br />Features:<br />Small size， light weight<br />Open source firmware<br />Could correct up to 25% data bit error<br />MAVLLink protocol and FHSS technology<br />Based on Si1000 microcontroller and Si4432 wireless module<br /><br />Specification:<br />CP2102 USB/TTL chip<br />Frequency: 915MHz<br />Power: 100mW/250mW optional<br />Support MWC/APM/PIXHAWK/PX4 open source flight controllers， etc<br />Receive sensitivity: -118dbm<br />Full duplex communication 2ch auto adaption TDM<br /><br />Package Information:<br />Package size: 17 * 9 * 1.5cm / 6.7 * 3.6 * 0.6in<br />Package weight: 75g / 2.6oz<br />Adhesive taps package<br /><br />Package List?<br />1 * 3DR Radio Telemetry Kit 915Mhz Module<br><img src="//img.tomtop.com/product/xy/2000/2000/p/gu1/R/RM2979/RM2979-8-d7fc.jpg" /><br>$$<img src="//img.tomtop.com/product/xy/2000/2000/p/gu1/R/RM2979/RM2979-15-d7fc.jpg" /><br>$$<img src="//img.tomtop.com/product/xy/2000/2000/p/gu1/R/RM2979/RM2979-6-d7fc.jpg" /><br>$$<img src="//img.tomtop.com/product/xy/2000/2000/p/gu1/R/RM2979/RM2979-2-d7fc.jpg" /><br>$$<img src="//img.tomtop.com/product/xy/2000/2000/p/gu1/R/RM2979/RM2979-5-d7fc.jpg" /><br>$$<img src="//img.tomtop.com/product/xy/2000/2000/p/gu1/R/RM2979/RM2979-1-d7fc.jpg" /><br>$$<img src="//img.tomtop.com/product/xy/2000/2000/p/gu1/R/RM2979/RM2979-11-d7fc.jpg" /><br>$$<img src="//img.tomtop.com/product/xy/2000/2000/p/gu1/R/RM2979/RM2979-3-d7fc.jpg" /><br>$$<img src="//img.tomtop.com/product/xy/2000/2000/p/gu1/R/RM2979/RM2979-10-d7fc.jpg" /><br>$$<img src="//img.tomtop.com/product/xy/2000/2000/p/gu1/R/RM2979/RM2979-9-d7fc.jpg" /><br>$$<img src="//img.tomtop.com/product/xy/2000/2000/p/gu1/R/RM2979/RM2979-16-d7fc.jpg" /><br>$$<img src="//img.tomtop.com/product/xy/2000/2000/p/gu1/R/RM2979/RM2979-4-d7fc.jpg" /><br>