And the "updated version," which I just ordered on eBay for $30....
Mini 8 Multi Voice Changer Microphone Megaphone 3-in-1 Loudspeaker Amplifier
Easy to operate.
Can make your sounds more louder.
Can work with MP3, MP4, cell phone, and computer.
High performance-to-price ratio.
High quality, good frequency response.
Low power consumption.
Two lithium batteries, long battery life, up to 8 hours, charging low voltage protection function.
Loudspeaker enclosure is ABS material, case with strap, can be worn at the waist.
Suitable for teaching, tour guiding, sales promotion, and speech, etc.
Max output power: 10W
Working voltage: 7.5V
Frequency response: 200Hz-15kHz
Battery: 1000Ma lithium
Host size: 98 * 85 * 35mm
Net weight: 400g
Package Includes :
1 x Voice Changer Microphone & Megaphone
1 x Microphone
1 x Lithium batteries
1 x Strap
1 x Power Adapter
1 x Manual