Mwave offers the Hisonic 6-Watt Waistband Amplifier, model no. HS-125, for $49.99 with free shipping. (Amazon has it for the same price.) That's the lowest total price we could find by $13. This personal voice amplification system straps to the waist and includes a lapel microphone, headset microphone, a frequency response of 100Hz to 10KHz, and 6 AA NiMH rechargeable batteries.