Feature: 1. Adopt BT5.0 wireless transmission technology, the transmission speed is fast, and the sound quality is not affected. 2. The high-quality dynamic drive unit presents beautiful sound quality, balanced sound effect and powerful bass. Combined with Graphene diaphragm, bringing immersive sound experience. 3. Adopt ergonomic design, lightweight frame, comfortable to wear without fatigue. 4. Simple operation, convenient to use. 5. UV conservation design, better protect your eyes. Specification: Features: Adopt BT5.0 wireless transmission technology, the transmission speed is fast, and the sound quality is not affected. The high-quality dynamic drive unit presents beautiful sound quality, balanced sound effect and powerful bass. Combined with Graphene diaphragm, bringing immersive sound experience. Adopt ergonomic design, lightweight frame, comfortable to wear without fatigue. Simple operation, convenient to use. UV conservation design, better protect your eyes. Built-in speaker, unique acoustic cavity design guides the sound to form a directional beam, surround stereo audio is delivered directly to the wearer's ears. Specification: Brand: Lecoo Model: C8 BT version: V5.0+EDR Transmission distance: 10-15m Frequency range: 2402-2480MHz BT protocol: HSP/A2DP/AVRCP Battery capacity: 3.7V/120mAh Charging voltage: USB DC5V Packing list: 1 * Glasses headphone 1 * Charging cable 1 * Glasses case 1 * Glasses cloth 1 * User manual Package List: 1 * Glasses headphone 1 * Charging cable 1 * Glasses case 1 * Glasses cloth 1 * User manual