Features:
Flysky FS-i4 is a affordable, 4CH 2.4GHz radio system and also a very simple setup for your RC vehicle.
4 channels, reliable, interference free 2.4GHz AFHDS 2A signal operation. Included in the package is a 6-channel mini receiver that will fit in most vehicles.
The automatic frequency hopping digital system provides a strong, reliable 2.4GHz signal, so rest assured you'll always be in control.
Simple binding procedure, quick and extremely stable in performance. Use only 4 * AA batteries for transmitter.
The ergonomic feel of the trasnsmitter will feel good in your hands even after long track sessions.

Transmitter Specfications:
Channels: 4
Model type: fixed-wing/glider/helicopter
RF range: 2.405-2.475GHz
Bandwidth: 500KHz
Band: 142
RF power: less than 20dBm
2.4G system: AFHDS 2A and AFHDS
Code type: GFSK
Sensitivity: 1024
Low voltage warning: less than 4.2V
DSC port: PS2; output: PPM
Charger port: no
ANT length: 26mm * 2(dual antenna)
Power: 6V 1.5AA * 4
Display mode: LED indicator
Size:174 * 89 * 190mm
Weight: 335g

Receiver Specifications:
Channels: 6 Channels
Model type: Airplane / Glider / Helicopter
RF range: 2.405-2.475GHz
Bandwidth: 500KHz
Band sum: 142
RF Receiver Sensitivity: -105dBm
2.4G system: AFHDS 2A
Code type: GFSK
Sensitivity: 1024
Power: 4.5~6.5V DC
ANT length: 26mm
Dimensions: 45 * 23 * 9mm
Weight: 13g

Package List:
1* Flysky FS-i4 RC Transmitter
1* Flysky FS-A6 Receiver
1 * Bind plug