Philips LFH9380. Maximum recording time: 23 h, Recording modes: SP, SP mode frequency response: 300 - 5700 Hz. Display: LCD, Display diagonal: 43.2 mm (1.7 "), Backlight colour: White. Output power: 200 mW, Loudspeaker diameter: 30 mm. Interface: USB. Battery technology: Nickel–Metal Hydride (NiMH), Compatible battery sizes: AAA