The bone conduction earphone features ergonomic and adjustable, allowing you to enjoy a comfortable wearing experience. Owing to its equipped large memory, you can use this earphone as an MP3 player for you to listen to music without your phone. It is made of ABS and electronic components, which is reliable and durable. The length of the product is 15cm, the width is 9cm and the height is 1.5cm. It is suitable for sports, running, driving, gaming and so on. Item Name: Earphone Material: ABS, Electronic Components Model: LY1 Bluetooth-compatible Version: 5.2 Transmission Distance: 10 Meters Music Time: 8 Hours Standby Time: 180 Hours Charging Time: 1 Hour Charging Box Battery Capacity: 150mAh (Included) Waterproof: IPX5 Adaptation System: Suitable for iPhone and for Android Mobile Phones, and Digital Devices with Bluetooth-compatible Features: 9D Sound, Long Endurance, with Memory Size Details: 15cm x 9cm x 1.5cm/5.91" x 3.54" x 0.59" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Earphone 1 x Charging Cable Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.