Technical Details Package Dimensions 16.9 x 10.1 x 3.4 cm; 70 Grams Batteries 1 Lithium Ion batteries required. (included) Item model number QT82-BLK Wireless communication technologies Bluetooth Connectivity technologies Wireless Special features Microphone Included Other display features Wireless Color Black Whats in the box Lenovo QT82 Black, Charging Cable Item Weight 70 g Brand Lenovo Model name QT82-BLK Colour Black Form factor In Ear Connectivity technologies Wireless About this item The wireless headphones are compatible with almost all of phones, tablets and laptop with Bluetooth function. Touch button to control functions: Volume up/down, receive/decline/hang up phone call, play/pause music, previous/next song, etc. When opening the charging case, the Bluetooth headphones automatically matching. IPX5 grade waterproof design enables the earphones to resist sweat generated during your sport and other water splash. HiFi sound quality allows you to enjoy stereo music.