Features You can switch the frequency freely with the RP6D1 6ch dual conversion synthesized receiver. The "one button" function makes it extremely easy to change frequency. Despite the small size, the receiving range reaches as far 1 mile! The dual ceramic IF filters ensure ultra narrow selectivity, and can reject adjacent channel interference effectively. The RP6D1 can identify the shift polarity of the transmitter (FUTBA, JR) automatically. DSP technology filters noise intelligently eliminates glitches effectively. Failsafe function to put servos in a predetermined position in case of lost signal reception. Specifications Dimensions: 48 x 21 x 12mm, 1.9 x 0.8 x 0.4 inches Net Weight: 9.5g (with shrink wrap) Frequency: 40MHz No. of Channel: 6ch Operating Voltage: 4.8 - 6V DC Operating Current: 17mA Max. Distance Range: 1500M / 4900ft Sensitivity: better than 2uV Selectivity: +8 kHz at 65 dBdown Filtering: Dual turned RF circuitry, Dual 4 pole ceramic filiter, DSP filtering with mild algorithm Modulate: FM / PPM Intermediate Frequency: 10.7MHz IP3: +10dBm This is special edition bundle with RCECHO Apps license key included for more fun!. RCECHO is a registered trademarks. Products only distributed by authorized seller.