RCA Lyra RD2315 512 MB Personal Digital Audio Player with Voice, Line-in and FM Recording Lightweight digital audio player with large control buttons and LCD 512 MB flash memory holds 8 hours of MP3 and 16 hours of WMA audio; expandable via SD cards Compatible with MP3, WMA, and secure WMA FM tuner with record capability and voice recorder; line-in recording to MP3 Powered by single AAA batter for up to 20 hours of battery life