- Dimensions: 3.7 x 8.5 x 16.2 cm - Weight: 113 Gramm - With 35dB Dual Active Noise Reduction technology, the in ear headphones bluetooth has a front and feedback microphone, you can enjoy a world where background noise is reduced by up to 98%. - Fast charging: The bluetooth headphones integrates a low power chip, charges for 10 minutes, you can listen to music for up to 3 hours. A single charge can be used up to 6 hours, plus the charging box can run up to 28 hours. - The headphones wireless can be connected to two cross-platform devices such as Android, iOS and Windows at the same time, so you can easily switch between entertainment and work Nebramuss. - In-ear detection: take off the bluetooth headphones in ear to pause music automatically, put the headphones back on to resume playback. IPX4 is absolutely splash-proof, protected from sweat and splash water mistramuss. There are three sizes of silicone ear cushions to choose from, providing a more comfortable user experience. Headphone positioning: In Bluetooth connection area, the wireless headphone can be positioned by sound.(Only for Xiaomi/Redmi phones).