Speaker Output Power: 10W*2 + 60W = 80W Speaker Size and Impedent: 52mm*2 4Ω 10W, 135mm 4Ω 60W Transmission Distance: 10 Meters Frequency Transmission Range: 15Hz to 18,000Hz Battery Type: Lithium-ion Polymer Rechargeable Battery 7.4V 12500mAh (theority capacity) (makes it Portable as it is Independently Powered) Power Source: USB, Wall Charger (Power the speaker in the event of power outage) Charging Voltage: DC 5V 2A Material: Rugged ABS Estimated Size (mm): 283 L * 228 W * 271 H Weight: 4000g