Harman Kardon Onyx Studio 9

Woofer 1 x 120mm, Tweeter 2 x 20mm 50W RMS Rated output power Power supply 100-240Vac, 50Hz/60Hz Frequency response 50Hz – 20kHz (-6dB) Signal-to-noise ratio > 80 dB Li-ion polymer 11.70 Wh (= 3.6 V/ 3250 mAh) Battery charge time 5 hours up to 8 hours (dependent on volume level and audio content) Bluetooth version 5.2 Weight 3.52 kg / 7.76 lbs Dimensions (W x H x D) 312 x 275.8 x 163.8 mm