this mini interview recorder. ideal for both spy camera and hidden camera, small enough to conceal almost anywhere!! wherever you place your mini camera, you'll know for sure that you won't miss anything. the micro-camcorder pen cam is the smallest high resolution, real time digital camcorder ever produced. easy to use "one touch record" button lets you discretely record any evidence instantly. camera technical parameter : dimension: 150mmx15mmx15mm. weight: 30g. video compression : avi video format,352x288. voice recording: yes. internal memory: yes. flash:1 gb or 2 gb. recording mode :continuous recording until memory is full or manually off. adaptor type: usb adaptor charging cable. battery type : lithium-ion. record time : up to 5h. battery use time : about 3h. tiny size makes it ideal for a variety of uses. it's great for use as a hidden cam, spy cam , etc. real time recording in avi video format. color video with voice lets you clearly see who's there and hear what they say. place it up high or conceal it down low. with built-in rechargeable battery so there's no long cord for you to hide. playback video on pc. more surveillance products info pls visit our website at www.szkws.com