Bluetooth Features 1. Bluetooth 5.0: Bluetooth 5.0 produces incredible sound quality with crystal crisp treble. Enjoy your music everywhere even in a loud environment. 2. Voice Reminder: This high-quality earbuds can show phone power and voice control, and Siri function helps your control your phone any time, which provides you a wonderful experience. 3.Easy Pairing: When you take out 2 Earbuds from the charging box, the earbuds will automatically power on and connect to each other, then pairing to your Bluetooth device. 4. Long Use Time: Hands-free earphones will provide you with up to 4-4.5 hours calling time. A mini and portable 300mAh charging case will support recharging your earphones. 5. Stable and Comfortable: Ergonomic design for sport, workout, running, jogging, hiking, biking, gym etc. Specification: Bluetooth Version: 5.0 Configuration: High with true copper ring speaker, Battery: 300mAh+30mAh Calling Time: 4-4.5 hours Listening Time: 2.5-3 hours Color: White Package Included: 2 x Headphones 1 x Charge Box 1 x Charging Cable 1 x User Manual