Product Features: Cute Pet Style and RGB Colorful Gradient Light and Wireless Bluetooth Connection and AUX Wired Connection and Call Bluetooth version: V5.1 (Jerry 6956A solution) Transmission distance: 15 meters Operating frequency: 2.402-2.480GHz Battery capacity: 3.7V or 400mAh Charging voltage: DC5V Battery life: 20 hours with lights off and 8 hours with lights on Charging time: 2 hours Drive unit: 40MM Regular colors: black, white, green, blue, pink, khaki, purple Earphone size: 185mm x 76mm x 197mm Additional accessories Type-C charging cable × 1 Type-C to 3.5MM audio cable (supports calls) × 1 User manual × 1 3D pet backpack design, colorful breathing lights, comfortable to wear, extra long battery life, foldable design, Bluetooth 5.1 or plug-in, IOS or Android compatible Design of pet spacecraft backpack. The design inspiration comes from the space capsule pet backpack, with a sleek and cute appearance accompanied by cute pets, taking you to explore the universe of music. One click glow. Built in breathing light design, it lights up instantly with just one click, and a colorful breathing gradient light. Even at night, I can't block the brilliance of my headphones Comfortable to wear, lightweight design without burden. Scalable design, soft and breathable earmuffs, with a damping and silent structure, multi angle fitting to the ear angle, comfortable to wear for a long time. Foldable and portable for travel. Multi axis rotation design meets various storage methods and is easy to carry. Long lasting battery life, one charge, 1 week of use. Bluetooth 5.1 or AUX audio cable. Both modes allow for voice calls. Physical buttons, exquisite control, intuitive and easy operation. Large size provides excellent sound quality, with 40mm large dynamic units and more diverse layers, enjoying HIFI sound quality. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.