From TK Products, LLC
Model: Aker MR-AK38
Color: Black
Peak Power output: 25 Watts
Frequency response: 100hz ± 13db1khz ± 1db
Dimensions: 3.74in Diameter x 5.79in Length (95mm x147mm)
Weight (w/ Batteries): 1.72 lbs (780 g)
Voltage: 7.5v
Current consumption: 150mA Speaker Sensitivity: 53 dBV/A +- 3 dB
Power Source: Built-in Lithium Rechargeable batteries
Battery Life: 10-15 hours, 6 hour recharge, 2-3 year life (replacements available)
Also included: Headset microphone, Charger cable (US plug), MP3 cable (male to male 3.5mm), MP3 line in port, Microphone line in port, adjustable waist band, Carry bag.

Possible Uses: Costumes, Props, Electronic sound effects, MP3 player, Teachers, Professors, Ministers, Coaches, Tour guides, and Presentations.

Features:
- Built in FM Radio
- USB and MicroSD port for playing MP3 music and sound files
- Rechargeable lithium batteries that last 10-15 hours of continuous use before needing a charge.
- Battery life will last 2-3 years.
- Sound covers over 6,000 square feet.
- Comes with adjustable waist or neck band
- Can also be used MP3 speaker. The amp has a microphone input and a MP3 input . The amp will accept signals from both input ports and out through the speaker at the same time.