【17 Hours Playtime】Enjoy long-lasting music with up to 17 hours of playtime on a full charge. 【Bluetooth 5.3】Stable wireless streaming with a range of up to 100 meters in open areas. 【IP67 Water & Dust Proof】Durable and resistant to water and dust for outdoor and indoor use. 【USB-C Charging】Quick recharge in just 2.5 hours, with a 20-minute charge giving you 5.5 hours of use. 【Mono Audio Output】Strong and clear sound with an 88 dB SPL at 1 meter. 【Multi-Directional Control Knob】Easy to control music with a convenient multi-directional knob. 【Built-in Microphone】For hands-free calls and voice commands. 【Marshall Bluetooth App Compatible】Manage sound settings via the Marshall Bluetooth app for iOS & Android.