Smart Chip Control Handle: According to the ergonomics design,it's using the Acrylonitrile Butadiene Styrene material,which make it touch comfortable,operate convenience,dedication and easy to carry. Feature: High impact,high heat resistance,flame retardant,touch comfortable. Power Supply Lithium rechargeable batteries. Charger Adopting a constant current and a constant voltage charging mode.With function of re-verse voltage protection and battery voltage test instructions,and so on.