Photography recording function??00K pixels??br /> Camcorder pixels: 640x480??ormat??VI Memory??GB/4GB/8GB(optional) Built-in Li-battery, continuous photographing for about 2 hours Japan quartz movement No driver installation is needed if the operating system is Windows ME/ 2000/ XP/ Mac OS 9.2.2 or above (windows98 is excepted) USB Version:USB1.1/2.0 Built-in Li-battery:4.2V, 270mHA The Watch Camera & Recorder suitable for: 1) business man to record important talk, conference or negotiations. 2) company employees to record meeting memo for later analysis. 3) student to record important sections of lessons from school. 4) trainees to record important content from trainers lessons in training program. 5) audience to record wonderful part in party, lectures or concert, etc. 6) police to record secretly evidence and clean criminals. 7) law-officer or lawyer to record affidavit secretly from accuser or defendant in court. 8) private detectives, private investigators or investigation agents to record evidence. 9) Spy activities.