FEATURES: -IPX7 sweatproof/waterproof protection. Bluetooth V5.0 technology with CVC 6.0 noise-canceling, ensure you enjoying HD stereo sound with Enhanced Bass. Interchangeable ear hooks for a custom fit, ensure a stable & comfortable wearing. Comes with 3 sizes of silicone ear caps to experience better sound quality.-Ultra Small, and lightweight. Up to 4 hours of battery life on a single charge. Add extra 12 hours playtime with the portable charging box. One-Button design, one press to pair/play/pause or answer / reject a phone call. Built-in microphone, you can enjoy the hands-free calling. Compatible with all Bluetooth enabled devices. Earbuds: Bluetooth version V5.0 dual mode Distance: up to 15 meter Full charging time: 1.5 hours Play time: About 4 hours Earbuds charging current: 60mA Mic sensitivity: :-362dB Frequency range: 20~20,000Hz Dimension: 50*40*25.5mm Earpiece weight: 7.5g Battery: Rechargeable Li-battery 650mAh(Provides 4 Times Charges) Full charging time: 2 hours Charging case input:5V 500mA Output:5V 120mA