It's not only used for writing but it also has a built-in DVR with HD camera which can be used to capture high resolution photos and video. It's indeed a cool gadget which is great for monitoring and capturing any situation or for just having fun. Its PC camera functions offer easy enjoyment of network life.A pen built in DVR， concealing design.Supports video recording function， also can shoot photos.Built-in rechargeable Lithium battery， can continuously work.Ex-slot for TF card， movable storage.Video Format: AVIVideo Code: M-JPEGVideo Resolution: 720*480Frame Rate: 30fps?��1fpsPlay Software: The operating system self bringing or the mainstream video player software， Kmplayer is recommended.Picture Format: JPG， 1280*1024Pixel: 8MP Image Scale: 4:3System Support: Windows me/2000/xp/2003/vista��?Mac os 10.4��?Charging Voltage:DC-5VCharging time: About 2 hoursInferface Type: USB standard interface; ex-slot for TF card(card not included)Storage Support: Nand FlashBattery Type: High capacity polymer lithium batterySize: 14cm length; 1.3cm diameterPackage included:1 x HD Spy Camera Pen Video Recorder1 x Data Cable1 x User Manual