Features:

• Input - 1/8 (3.5mm) Mini Stereo Jack
• Drivers - Two Odyssey Neodymium drivers
• Power Output - 3 Watts per Channel
• Frequency Response - 100 Hz ? 20,000Hz
• Input Impedance - >10Kohm

Editor Reviews:

Product Description:
Enjoy high quality audio from a variety of devices including the iPod, iPod mini, MP3 and CD players, desktop computers (all platforms), laptops, and most portable devices. The JBL On Tour combines many proprietary technologies to provide the highest quality sound and playing time. The On Tour will provide astonishing bass and clear, accurate sound from a pocket-sized system. The two aluminum domed transducers are driven by powerful Neodymium magnets. This design provides a full, rich frequency response from the lowest bass to the highest highs. Signal-to-noise ratio is greater than 80dB. Voltage input is 100-230 VAC, 50-60 Hz, for use around the world.

Rating : - Excellent sound in a compact package.
This is a great sounding speaker set for its size, I was amazed. It is perfect for purse, briefcase or backpack. I haven't used it with batteries yet but they should last a reasonable amount of time if you keep the volume at a personal level. Highly recommend.