Product advantage: 1) Consumes less power 2) Works continually for more than 12 hours Specifications: 1) Music formats: compatible with MP3, WMA and other formats 2) Sound effect formats: jazz, classic, rock, pop, normal 3) Play mode: repeat mode, unique preview mode 4) LCD board: 96 x 26 lattice, E1 blue backlight 5) Earphone: specially designed necklace type 6) SNR: 90dB 7) Earphone output: 5mW + 5mW 8) Output range: 20Hz - 20kHz 9) Records sampling frequently: 80kHz 10) Supported compression speed: 32Kbps - 256Kbps 11) Weight: 32g (not include battery) 12) Battery: 1pc AAA alkaline cell battery 13) Supported operation system: Windows 98 / ME / 2000 / XP / Mac OS 14) With FM Function