Keku Mini Lightweight Wireless Stereo Sports/running& Gym/exercise Bluetooth Earbuds Headphones Headsets W/microphone for Smart Phones Bluetooth Devices High Compatibility and English Prompt Voice. Compatible with Bluetooth enabled music players and A2DP enabled devices such as iPad, iPhone, iPod touch, Android Smart Phones, tablets, etc. Fit for iPhone 6 6Plus 5S 5C 5 4S, Galaxy Note 3 2 S4 S3 and Google Blackberry, LG other Smartphones The Highest Standard Parameters:Bluetooth 4.1 achieves the goal of energy conservation. It also provides the great stereo sounds and clear speech with CVC noise reduction. The Stable and strong signal: Bluetooth 4.1 technology,the signal strength is nearly twice times than the general bluetooth headset in the market.the signal is stable no matter you turn left/right or other directions of the body. Sweat Proof Design: Awesome portable and lightweight wireless headset can be stay in your ears comfortablely. The material of the headset is in a sweat design, but not dip it in the water. Long working and Standby Time: Up to 6 hours of Talk/Playing Time and 150 hours Standby Time.