Technical Pro 72-pow1100 Technical Pro Battery Powered 1100 Watt Portable PA System Product Specs: 1100 watts peak power; Built-In rechargeable battery fully charges in approximately 8-10 hrs; Dual VHF wireless handheld & wireless headset microphones with 75-Feet range; two 1/4-Inch microphone inputs with volume control; One 1/4-Inch guitar input with volume control; Unit can be charged via 12V, 110V or 220V outletMicrophone Echo controlBass & treble controlsImpedance: 4 ohmsSensitivity: 94 2dB (1W@1M)Frequency response: 80Hz - 20KHz Full Length perforated steel grillTwo heavy duty side carry handlesBuilt-In Dual 7 Band EqualizersEqualizations Points: 100Hz, 315Hz, 630Hz, 1kHz, 4kHz, 8kHz, 16kHz/Adjustment Range: 12dB iPod will charge while in loading dockIncludes wheels and extendable carry-on type handleReinforced steel cornersFor maximum battery life the battery should be fully charged prior to its initial use