Everus S5530 Rainproof Sports Stereo Wireless Bluetooth V 4.0 Headset Earphone Headphone-Red Free switching of double ears piece into a single side. The wire can be removed & assemble by yourelves and flexible ear loops can be adjusted according to your ear size. Incorporating the Ergonomics /Chewing Sweet design and in-ear design,this headset is extremely comfortable and secure for the most users: bicyclist, runners, joggers, walkers etc. With its fashinable appearance and built-in CSR8635 prefessional music bluetooth chip with HIFI Stereo earphones, you can always enjoy HD quality/Double ears piece 3D stereo sound.Double-microphone noise cancellation. The built-in Mic with voice prompts and voice message can answer incoming calls. Built-in Double rechargeable lithium battery,up to 6-Hr Music time ,6.5-Hr Handfree call talking time and 3-Hr Charge time & 240 Hr Standby time. The two sides of the headset(left and right) both have one battery,you need both charge them before using.Only need to pair once and easy to pair, beeps when it is running low,and also fit for gamers and gaming. Bluetooth v 4.0 + EDR ,Rainproof sport design ,supports Headset Profile / HandsFree Profile/A2DP Profile/AVRCP Profile.10 meter Bluetooth connection range. Compatible with iPhone 6,6 Plus,5S 5C 5 4S 4, iPods,Samsung Galaxy Note 3, Note 2, S5 S4, S3, S2 Most Android Smart Phones and other Bluetooth-enabled tablets.It can connect two cellphones simultaneously.