Product Description Material: ABS+silicone Headphone size: 25 * 17 * 34 mm Charging compartment size: 54 * 76 * 30 mm Bluetooth distance: less than or equal to 15 meters Battery life: 20 hours Headphone charging time: 1.5 hours Headphone voltage: 3.7 V Headphone battery capacity: 45 mAh Charging compartment voltage: 3.7 V Rechargeable battery capacity: 400 mAh Support protocol: HFP/A2DP/AVRCP Color: white Quantity: 1 piece Package content: 1 piece * wireless bluetooth headset 1. Bluetooth 5.1 technology, one-step pairing: The bluetooth headset offers class-leading bluetooth 5.1 technology, paired with a highly sensitive antenna and strong connection quality to provide a great connection with virtually no dropouts, even in busy areas. That means: smooth, clear conversations and no interruptions while listening to music on the go. Take 2 wireless headphones out of the charging case and they'll connect automatically. 2. HiFi sound quality and noise canceling: Bluetooth headphones in ear are equipped with high-quality 14.2mm driver units and a biological membrane, which ensure deep bass and stereo sound. Built-in high quality microphone and lossless HD rendering technology for an incredible music experience. Thanks to the excellent noise cancellation technology, the bluetooth headset effectively filters outside noise, which makes the call clearer and the sound quality better. 3. Waterproof and design of ear hook for sports: The bluetooth headphones are equipped with an innovative ear hook design, which eliminates the worry of falling during sports. The bluetooth headphone sport is as light as a feather, with special sport ear hooks and an ergonomic design that fits comfortably on your ears for a long time. The waterproof technology efficiently protects headphones from damage caused by sweat and rain. Perfect for running, yoga, fitness, cycling etc. 4. LED power display and touch control: These wireless headphones are equipped with a unique intelligent digital LED display that shows exactly the remaining power in digital format. The charging case presents the battery from 1% to 100%. There are separate power consumption indicators for the right or left wireless headphones. Just touch the earbuds to play / pause music, change song, volume +/-, answer / end call, voice assistant. 5. 20 hours of playtime and USB-C fast charge: Thanks to the bluetooth 5.1 chip with lower power consumption, the headphones can wirelessly offer bluetooth for 8 hours of uninterrupted play. The portable charging box can charge the in-ear earbuds 3 times to extend 20 hours of play time. Thanks to the latest USB-C charging connection, charging only takes 1.5 hours to fully charge the charging box.