Use Special 3bdi Antenna Gain Antenna, Amplifier of more than 15db Gain insided. Stronger anti-interference,Further distances( Up to 2km) Support PPM channel, for QUADCOPTER Extra Satellite is not needed,more convenient. RANGE: 1.5-2KM The MKron S603 Super 6-Channel Receiver is a great solution for all model aircraft requiring full range up to 6 Channel. This receiver is more powerful than AR6200 and AR6210 Receiver, This dual path redundancy, plus the fact each of the two receivers is located in a slightly different location, exposes each to a different environment and creates a link in all conditions. Type: Full Range Aircraft Receiver Channels: 6 CH Modulation: support Digital Spread Modulation X Band: 2.4GHz Voltage Range: 3.5-9.6V Color: As Shown Material: plastic Package Contents: 1set x Receiver 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 +/- 1-3cm.