Lightweight wireless Bluetooth in-ear headphones that have been designed specifically for use during exercise and features mechanical waterproofing design which protects them against splashed and sweat. They are also probably the smallest Bluetooth sports headphones with the controllers on the headset body. The 7mm neodymium dynamic speaker drivers construct superb smooth bass resonance, while the refined engineering design with removable Safe Ear-ring of the in-ear headphone allows user to focus on whatever he is doing without decreasing his comfort or falling out of his ears. Combination of the Bluetooth V4.1 version with operating distance of up to 10 m and aptX codecs delivers 16-bit and 44.1 kHz CD-quality wireless audio via secure and stable connection and also allows for multi-point connections with two phones. Other features include battery meter on iOS devices, English voice prompt, voice dialling/redialling and support VOIP connect with computer for online chat. The headphones provide talk/music playtime of up to 4 hours and standby time of up to 60 hours. Full re-charging takes about 2 hours. They come supplied with two pairs of ear-fins - one pair with tail and another one without tail, six pairs of ear-buds in two designs (bowl and bullet), carrying pouch and USB charging cable. Frequency response: 20 Hz-20 kHz. Dimensions: 22 x 15.4 x 26 mm. Weight: 11 g. Green colour design.