The Travelsound 400 is designed to work with any MP3 player. The unit features a compact, rotating design which protects the speakers during travel, advanced digital amplifier and premium one-inch NeoTitanium microdrivers for enhanced clarity and power efficiency, with magnetically shielded speakers delivering four Watts RMS. The Travelsound 400 offers up to 35 hours playtime from four standard AAA batteries, a Wide Stereo feature for an expanded sound stage. The unit includes a carrying case, connection cable, on/off switch and cool blue 'power-on' LED. Expected retail price is around £50 (approximately $75).