This product is sold by: Unit.Dimensions: 11.22 X 5.51 X 2.76Small Super Powerful Voice Amplifier Used by Teachers, Coaches, Tour Guides, Presentations, US Army Built In Rechargeable Lithium Batteries That Last Up To 12 Hours Of Continuous Use Before Needing A Charge Projection Range Up To 1/2 Mile Includes Headset Microphone AUX Input For MP3 Player Or Ipod Frequency Response: 100hz 13db1khz 1db Current Consumption: 150ma Charging Time: 6 Hours Speaker Sensitivity: 53 Dbv/A +- 3 Db Unit Includes Charger Belt Clip, Adjustable Waist Band Strap, Rechargeable 7.4 Volt Lithium Battery Color Black Speaker Dimensions 3.86'' X 3.62'' X 1.85'' Weight: 0.88Lbs shipping to the USA $15.0625