Philips Voice Tracer LFH-7630, 17 h, 300 - 7.500 Hz, 32 MB, LCD, 50 g, 110 x 33 x 19 mm Philips Voice Tracer LFH-7630. Maximum recording time: 17 h, Frequency range: 300 - 7.500 Hz. Internal memory: 32 MB. Display type: LCD. Weight: 50 g. Dimensions (WxDxH): 110 x 33 x 19 mm, Battery type: AAA