[RETRACTABLE EARBUDS] : DolTech 918 Bluetooth Headsets with retractable wire management keeps your wire from mass, good for outdoor sports and indoor home leisure. Really set your hands free.

[FLEXIBLE & LIGHTWEIGHT]: weighs only 1.3 oz in flexible and durable silicone neckband, 50% lighter than any other neckband headset

[VOICE PROMPT AND VIBRATION] -- Voice And Vibration alarm when call comes in or pairing successfully,battery low/high. Power on/off, assisting you never to miss any incoming calls while busy with other stuff and mater your headphones status conveniently.IPX4 sweatproof, set free from worry of sweat damage while working out.

[HIGH CLEAR SOUND QUALITY] -- Built-in microphone with CVC6.0 noise cancellation and Echo Cancellation reduce background noise so you won't miss any important details from your phone calls and enjoy HiFi stereo music in daily life.

[ADVANCED CSR BLUETOOTH 4.1] -- Supports Faster Pairing with One or two bluetooth devices at one time. Compatible with iPhone, Android, Windows Phone. Durable battery performances 15 hours of talk time, 12 hours of music and 500 hours of standby with a full charge.