Your neck will not feel uncomfortable because the Bluetooth-compatible earphone adopts ergonomic design. It features long standby time, so you do not charge it frequently. With IPX7 life waterproof performance, the earphone is not afraid of sweat and rain. The use of magnetic adsorption design makes the earphone prevent winding and slipping. Constructed of ABS material, it is safe to use. The length is 18cm, the width is 15cm, and the height is 2cm. It works for Android, for iPhone, and digital devices with bluetooth-compatible. Item Name: Wireless Headphone Material: ABS Waterproof Grade: IPX7 Talk Time: 60 Hours Charging Time: 2 Hours Standby Time: 360 Hours Bluetooth-compatible Version: 5.0 Transmission Distance: 10 Meters Charging Compartment Battery: 600mah Frequency Response Range: 20Hz-20000Hz Features: Stereo, Noise Cancelling, Automatic Pairing Size Details: 18cm x 15cm x 2cm/7.09" x 5.91" x 0.79" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x User Manual 1 x Charging Cable 1 x Wireless Headphone