Feature:1. This earphone adopts bluetooth-compatible 5.1 that is lower power consumption and supports many devices; 2.This waterproof headphone comes with a charging case that can charge the headphone about 8 times; 3.This wireless earphone is waterproof that makes you don't need to worry about sweat; 4.This bluetooth-compatible earphone is comfortable to wear and can provide stereo sound performance; 5.This wireless headphone is convenient to operate and control, let you can easily switch songs, answer calls, and so on Size:Earbuds 2.4x1.8cm,Case 7.5x5cm