The Harman Kardon Onyx Studio 9 is an elegant 50W RMS home speaker featuring a 3-channel system with a 120mm woofer and three tweeters for rich, self-tuning room audio. It offers up to 8 hours of battery life, Bluetooth 5.3 multipoint connectivity, Auracast pairing, a 3.5mm aux input, and a USB-C port that doubles as a phone power bank. Built sustainably with recycled plastics and a polyester yarn grille, the 3.36 kg indoor unit features an iconic circular shape and an integrated aluminum handle for easy room-to-room portability