• With compact portable design
• Bluetooth 4.1 + A2DP technology
• Built-in microphone
• Digital volume control
• Offer the clear communication; can be used as a headset and can easily control music and phone calls
• Built-in rechargeable lithium-polymer battery
• Sweat-proof: Effectively prevent sweat and rain from interfering operation of headset
• Crystal clear sound: This item has the Bluetooth 4.1 standard and great audio performance will produce clear, full sound.
• Wind noise reduction. The snug-fitting earplugs can ward off the peripheral noise and letting you enjoy your media free of distractions.
• It's just 11.5grams, probably the lightest headset in the world
• T-Light in-ear design to ensure long lasting comfort in rigorous environment
Specification:
• Color: White
• Cable length: 580mm
• Package weight: 3.3 oz/93g
• Bluetooth version: Bluetooth V4.1
• Bluetooth profiles: A2DP, AVRCP
• Frequency range: 2.4GHz-2.48GHz
• Frequency response: 20Hz-20kHz
• Charging time: about 2 hours
• Micro USB port for battery recharge
• Operating distance: up to 10m (free space)
• DC battery power: built-in rechargeable lithium battery
• Talking/music playing time: about 5 hours
• Standby time: about 180 hours
Included:
• 1 x Bluetooth sports headset
• 1 x USB Charging Cable
• 1 x User manual
• 3 pairs x Silicone ear tips (S/M/L)

Size is listed as US