Brand Name : HOCO High-concerned chemical: None Material: ABS Maximum wireless range : : <10 m Category: :Earphones & Headphones Number Of Drivers: 2 Charging Method : Charging case Driver Diameter : 10 mm Impedance Range : up to 32 Ω Bluetooth Version : other Package List: :User Manual, Charging case, Charging Cable Features : Active Noise Cancelling, Dual Connection