Wireless Bluetooth stereo headphones that were designed specifically for use during exercising with their sweat, dust and shock resistance. Combination of the Bluetooth V4.1 Class II 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. The ultra large neodymium dynamic speaker construct ensures superb smooth bass resonance. The headphones are built for action – they are sweat-proof and waterproof (IPX4 rating) and fit comfortably in the ear thanks to the refined engineering design with removable safe-hook of the in-ear headphone. The easily accessible on-ear control allows user to control the music or calls, while the dual microphones deliver superb wind reduction and crystal clear calls. Other functions include NFC connectivity, caller phone number announce, battery meter on iOS devices, English voice prompt, voice dialling/re-dialling and support of VOIP connect with computer for online chat. The headphones provide talk/music playtime of up to 6 hours and standby time of up to 100 hours. Full re-charging takes about 2 hours. They come supplied with safe-hooks in two sizes (S,L), ear-buds in three sizes (S, M, L), carrying pouch and USB charging cable. Frequency response: 20 Hz-20 kHz. Dimensions: 33.07 x 24.17 x 31.15 mm. Weight: 20 g. Green colour design.