For surface models.

Features:

Power Requirement: 4.8 - 7.4V battery (dry cells cannot be used)

Receiving Frequency: 2.4GHz

System: T-FHSS (auto detection) w/ SBUS2 port

Specifications:

Dimensions: 35.1x23.2x8.5mm

Weight: 6.5g

Antenna Length: 7-1/2"