1、OPEN AIR CONDUCTION DESIGN: Open ear bluetooth 5.3 headphones feature an open design that does not block the ear canal, allowing you to sense your surroundings and increase safety while exercising outdoors. 2、UNIQUE ON EAR DESIGN: Wireless air conduction headphones feature a unique hanging ear design, the headphones suspend securely on your ears and are not easy to fall off, making them suitable for outdoor sports. 3、BLUETOOTH 5.3 TECHNOLOGY: Open ear air conduction headphones utilize the latest Bluetooth technology to provide a more stable and faster connection and transmission speed. 4、14MM LARGE DIAMETER SPEAKERS: Wireless Bluetooth 5.3 Air Conduction Headphones feature 14mm large diameter speakers that provide richer sound expression and stronger bass. 5、WIDE FREQUENCY RESPONSE RANGE: Comprehensive coverage from bass to treble ensures that every sound detail is clearly represented. Item Type: Open Ear Air Conduction Headphones Material: ABS Connection: Bluetooth 5.3 Wireless Distance: Approx. 10m / 32.8ft Frequency: 20-18000HZ S N: ≥80dB Speaker: Approx. 14mm / 0.6in Battery Type: Built In 60mAh Lithium Battery Music Playback Time: About 5 Hours Battery Charging Time: About 1.5 Hours 1 x Open Ear Air Conduction Headphones 1 x Data Cable 1 x Instruction Manual