Y88 Wireless Earphone Bluetooth Headset Sunglasses Music Headphones Smart Glasses Earbud Hands-free with Mic Features: 1. Sunglasses are combined with Bluetooth 4.1+EDR headset. 2. Polarized glasses reduce glare, filter light, and effectively protect eyesight. 3. Stylish spectacle frame, light, flexible and durable. 4. The Bluetooth headset brings you great listening enjoyment. Compatible with almost all audio devices that support bt. 5. Built-in microphone, support hands-free call, convenient to answer and end calls. 6. Suitable for outdoor activities such as cycling, fishing, driving, mountaineering, golf, etc. Specifications: Bluetooth version: BT 4.1+EDR, Class 2 Bluetooth configuration: A2DP, AVRCP, headset Working distance: 10m (without obstacles) Frequency response: 20-20KHz Sensitivity: 95 dB Impedance: 32?? Battery capacity: 3.7V110mAh Music playback time: about 4 hours Talk time: about 5 hours Charging time: 2-3 hours Charging voltage: DC 5V 500mA Charging port: micro USB port Colour: Black Product size (folded): about 14.0 * 5.2 * 3.8 cm Product weight: 30g Packing size: 15.6 * 6.2 * 3.6cm Package weight: 61g Packing quantity: 150 setscarton, 9.2 kg Packing size: 51*40*35 CM Packing list: 1 * BT sunglasses 1 * Wired headset 1 * rag 1 * USB cable 1 * Carrying bag 1 *EnglishChinese user manual