Almost New Condition Bluetooth Headphones Wireless Blue/Black Hot S9 Sport Wireless Headphones with TF Card Slot BS19C Bluetooth Headphones Wireless Earbuds In-Ear Headphones with Mic For Smartphones LEVEL OF WATERPROOF DESIGN Three-dimensional movement headset primary nano mois- tureproof waterproof design speed can prevent corrosion of sweat and inadvertently coffee splashes, drizzle 100% 150mAh Battery Music Time 5-5.5 hours (Tested) 9 hours Call Time With Battery protection board The side volume adjusting button.Click the button for volume up and down. double click on the button to quickly switch song music, simple and convenient.