The DEVO-4 uses a 2.4 GHz Direct Sequence Spread Spectrum (DSSS) technology and includes an automatic ID binding and ID assignment. It can also be adjusted individually fixed IDs.

Specifications:
Encoder: ARM micro computer system
Frequency: 2.4 GHz
Output Power:-20dBm ~ 5dBm
battery: 1.2VX4 Nicard or 1.5VX4 AA
Power Consumption: 220mA
Package size: 27 * 21 * 11cm / 10.6 * 8.3 * 4.3in
Package weight: 594g / 1.3oz

Package list:
1 * Walkera Devo 4 Transmitter (Model 2)