>>PHYSICAL UNIT DIMENSIONS : 229 x 163 x 350 mm WEIGHT : 4.9 kg >>POWER MAINS INPUT VOLTAGE : 100–240 V MAINS FREQUENCY : 50-60 Hz >>AUDIO SPECIFICATIONS DRIVER TYPE : Dynamic FREQUENCY RANGE : 40-20,000 Hz ADJUSTABLE BASS AND TREBLE CONTROLS : Fine-tune your music using the analogue controls on your speaker STEREO/MONO : Stereo CABINET PRINCIPLE : Bass-reflex POWER AMPLIFIERS : - One 40 W Class D amplifier for the woofer - Two 15 W Class D amplifiers for the full range drivers - One 10 W Class D amplifier for the tweeters >>BATTERY BATTERY TYPE : Built-in, rechargeable Li-ion battery PLAY TIME : 20+ hours QUICK CHARGING : 20 minutes charge gives 4 hours of playtime CHARGING TIME : 2.5 hours