This model uses Smart Media cards to record its audio on. In this way you can listen to the recordered audio on different applications. Unlike the other DVR models they use external flash-memory: SmartMedia cards by size up to 128 Mbytes. Key specifications & features: Dimensions — 45x55x12 mm; Weight — 30 g.; Voice storage capacity — up to 140/280/560/1120 min depending on size of a used memory card 16-128Mbytes; Battery life: recording — 60-70 hrs, stand-by — 3-3.5 months; Battery type: DC 3V x 1, Lithium CR2450