Bluetooth Earbuds offers a playback time of up to 5 hours for every charge. Total play-time of up to 20 Hours Smart Touch Controls : With one multifunction button, you can play/pause, previous/next track and answer/hang-up calls Voice Assistant : Hammer KO Pro TWS Earbuds come with Voice assistant function lets you access Siri/Google Assistant Auto Pairing : Automatically pair with your device as soon as you take them out of the case. No need to manually pair to your device each time Bluetooth v5.3 : Maximize Performance, Stability, Connectivity, Effectively Reduce Power Consumption Water Resistant , Environmental Noise Cancellation, Automatic Pairing, Bluetooth 5.3, Voice Assistant, Smart Controls, Deep Bass