The Remax RB-S2 Magnet Sports Bluetooth Earphone is a high-quality earphone with outstanding features like Bluetooth v4.1, Light Portable, Long Battery Life, Smart Ergonomic Design, and others. The ergonomics of this earphone allow you to have comfortable wear and listen to music for a long duration of time. Due to the low frequency, you will be able to get extraordinary sound effects. The built-in Bluetooth technology supports up to 10-meter coverage from the device. The Remax RB-S2 comes with no warranty.