CUSTOM FIT & LIGHTWEIGHT COMFORT -- Ergonomically-designed headset and 3 different sized ear plugs ensure a great sung fit in ear. Weighs only 0.1oz (3g) and small enough, you can barely notice it while inside your ear. Also, the button is bigger and more easy to operate than others BLUETOOTH V4.1+ EDR -- EDR Tech enhanced Bluetooth connecting speed and range. Bluetooth distance farther than most of the products in the market ENHANCED BATTERY+2 MAGNETIC USB CHARGER -- Provides up to 6 Hrs talking time in 1 Hrs charge. Easy to charge with 2 magnetic USB stick charger. A well-designed carrying case is also provided to store earbud and accessories CLEAR AUDIO -- Clear audio offers ample sound and helps the other party hear you clearly. Easily to answer/end calls, play/pause music through the multi-function button MULTIPOINT PAIRING & AD2P SUPPORT -- Multipoint pairing for use with two devices at the same time. A2DP support for streaming audio from Bluetooth devices. Mpow offers 45 days money back & 18-month worry-free guarantee