Features: Bluetooth-compatible V5.0 with build in 150mAh lithium battery, 16G Memory(Optional), storage over 3000 MP3 Songs. 8 hours phone call, 8 hours music play, 300 hours standby time.open-ear headphones can connect to a variety of your favorite Bluetooth-compatible devices. Completely sweat and waterproof, Bone Conduction Headphones repel sweat, dust and moisture throughout your indoor or outdoor exercise routine. These sturdy workout headphones withstand your strenuous running, cycling, and more! Our open ear wireless headphones offer dynamic range and deep bass to give you premier sound quality for any music genre and feature a built-in mic for hands-free phone calls. 100% brand new and high quality Only 2.0oz, experience unrivaled comfort for all-day listening.The full wrap-around format of our open ear Bluetooth-compatible headphones hugs your head and right behind the ears, creating a more form-fit experience that won't slip or slide around during long runs or workouts. Our bone conduction technology delivers audio through the cheekbones, Unlike traditional headphones that send sound through the ear canals, With nothing inside or over your ears, enjoy total awareness and comfort while you listen. Package Includes: 1 PC x Headset 1 PC x Charging Cable 1 PC x Manual Specifications: Bluetooth-compatible Version: 5.0 Earphone Battery Capacity: 150mAh Charging Time: 1.5 Hours Play Time: 8 Hours Standby Time: 300 Hours Connect Distance: 10M/32.8ft Type: Standard / With 16GB Memory (Optional) Color: Black / Blue (Optional) Cable: With USB Charging Battery Life: 8 Hours Long/Per Charging Weight: 77g/2.7oz Size: approx 13.7x12.6x5cm/8.39x4.96x1.97in note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!