Volume can be adjusted conveniently on the cable. Integrated telephone function with call acceptance and microphone for smartphones. Remote function to control the music (pause/play/forward/reverse) if supported by the phone. Silicone ear cushions in S, M and L for a firm and comfortable hold. The special Sportsfix design of the earphones ensures a firm and secure hold in the ear - ideal for sports, for example: the silicone clip also fixes the in-ear in the ear. Also for wireless stereo via audio streaming (A2DP, HFP, HSP, AVRCP). Up to 4.5 hours of music or phone, up to 400 hours of standby. Easily switch between music and phone calls. Passive noise reduction.