The WR-9 features a refined, acoustically tuned wooden cabinet that delivers exceptional sound quality. with built-in full-range speaker and passive subwoofer and wireless Bluetooth with built-in rechargeable lithium-ion battery, enjoy up to 54 hours of battery life in Bluetooth mode.The AM antenna is optimally positioned to ensure good quality reception whether positioned upright or laid horizontally. Easily adjust the brightness level according to your preference and surroundings, ensuring the best user experience.The three-color LED indicator allows you to easily identify the current mode (FM, AM, or Bluetooth). Uses the same charger as other USB-C devices, so you only need one cable for all your electronics.