Fully compatible phone/tablet With Bluetooth, the compatibility of the compatible devices is also obtained great improvement. Binaural talk listen to the song The built-in touch panel of the headset effectively reduces the wight and volume of the headset, with a light touch. Large capacity charging compartment Quickly charge with sensitive metail contacts Key Features Battery compartment capacity: 200mah Chip: Lanxun 5376 Call duration: 4 hours 50% volume: battery life 6h 75% volume:5h battery life 100% volume:battery life 4h Weight: 31g Whole set Weight: 56g