Check the listing for details. DJI Wireless Follow Focus. Condition: Open box. Listed at 659.00 USD. Hello selling my DJI Electronic Follow Focus ... I purchased new to go with my drone I never got. **I never used the unit so no wear and tear.** Works as it should...you may want to do a firmware upgrade ( all the manuals and upgrades are on the DJI site) DJI FOCUSAdvanced, Precise Follow Focus System The DJI Focus uses DJI’s expertise in brushless motors for previously unheard of levels of precision and accuracy. The brushless motor puts just ±0.02° of accuracy in your hands so that turning the remote is just like turning the lens itself. It also features high torque and a fast reaction speed so you can keep your subject in focus no matter how it moves. DJI FocusSpecsGeneralOperating Frequency2.415-2.473 GHzMax. Transmission Distance100 m (out and unobstructed)Transmitter Power14 dBmOperating Temperature Range-20° to 55℃Remote ControllerWeight745 gDimensions153*86*90 mm BatteryModel: FB01-554461Type: LiPo Capacity: 1700 mAh,6.29 Wh Voltage: 3.7 V MotorWeight 170 gDimensions 90*50*26 mmMax. Torque 0.35 NmMax. Speed192 rpmWorking CurrentStatic current: 80 mA (@12 V) Stall current: 2 A (@12 V) Working Voltage9-16 VNoise