50 Watts Portable, Waist-Band Portable Pa System With A Headset Microphone w/Built In Rechargeable Batteries (Color Silver) Type: PA Speakers Specification: 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 Speaker Sensitivity: 53 Dbv/A +- 3 Db Color Silver Battery Time: Built In Rechargeable Lithium Batteries That Last Up To 12 Hours Of Continuous Use Before Needing A Charge Charging Time:6 Hours Dimension: 3.86 x 3.62 x 1.85 (H x W x D) Weight: 1.39 lbs. Package Contains: PWMA50S Unit Includes Charger Belt Clip, Adjustable Waist Band Strap, Rechargeable 7.4 Volt Lithium Battery