Features: E50: Diecast magnesium case, silver color. E30: MD ``Jacket'' size design, available in metallic silver, sparkling blue or sparkling orange. Both units: LCD display on both remote and main unit. 4 hours playback on Nickel-Hydride rechargeable cell, 5 hours on 1 AA cell alone, 10 hours with both batteries (though a user reports getting 5h40m on an E30 with a fully charged NiMH cell). Recharge time: 40%: 15 min., 100%: 60 min. External power: 1.5V with separately available power pack. Included accesories: Headphones w/remote, Ni-Hydride cell, recharger, alkaline cell w/case, carrying pouch, battery carrying case, ear attachment. AC adapter is sold separately.

Tips: Available in Europe, a Kippling fotocameracase is exactly large enough to hold the MZ-E30, 1 spare disc with case and the penlight batterycase.

Links: Sony's information page and (translated) English version. A scan of all the surfaces of an MZ-E50. Sony's English MZ-R50 page. An article from the Nikkei Business Weekly sheds light on how Sony's MZ-E50 MDplayer was created. A user's review of the MZ-E30. Daniel Perup has a page devoted to the MZ-E30 he won in a Sony contest. MiniDiscussion has collected user reviews for this unit.

Reviews:

User Manual: MZ-E30

Service Manual: MZ-E50