• Bluetooth 5.1 earphones get you stable and fast signal transmission, ensuring the music and call quality
• Built-in powerful 10mm moving coil sound unit, offering a crisp high pitch and powerful HiFi sound quality
• The neck-hanging design allows you to wear the earphones during exercise
• Waterproof design, can prevent sweat and moisture damage to components
• With built-in microphone, you don't have to worry about noisy environment or strong wind interference
• The wired controller makes it convenient to adjust the sound volume and switch songs 
• 45° tilt into the ear, perfect fit auricle, painless wearing for a long time

Specification:

• Bluetooth version: V5.1+EDR
• Wireless distance: 10 meters
• Headset battery: 120mAh
• Wireless frequency: 2.4GHz
• Support agreement: A2DP1. 3 / HFP1.6 HSP1.2 / AVRCP1.6 / D11.3
• Charging voltage/current: 5V/1A
• Charging time: about 1 hour
• Standby time: 300 hours
• Talk time: about 16 hours
• Listening time: about 16 hours
• Mi head sensitivity: -42dB
• Operating temperature: -10℃~50℃