Hobby Signal Phantom 4 Battery Parallel Charging Board Remote Control Intelligent Charger Multi Battery Charger for DJI Phantom4 Designed for DJI Phantom 4/PRO/PRO+ Can charge 3 batteries and 1 remote controller simultaneously Refitting from original charging program, automatic maintaining battery while charging. Built-in intelligent control, wind speed of the fan will change according to temperature Note: battery and remote controller are not included.