4GB preinstalled flash memory; 2 recording speeds: SP/LP; Digital audio: MP3 ; Voice-activated recording; Clip-on microphone; Earbuds; LCD display; Mini USB port; 3.5mm headphone output; Built-in microphone; Built-in speaker ; Skip forward/back/search buttons; Play/pause button; Hold function; On/off switch; Digital volume control; EQ presets; Recording indicator; Low battery indicator; Battery power indicator; Approximate battery life: 13.5 hours recording, 9 hours headphone playback & 3.5 hours speaker playback; Includes mini USB to USB cable, 3.5mm audio cable & telephone cable; Requires 2 AAA batteries;