"3.5 inch TFT internal LCD screen,320*420 Types of operation methods: touch screen Audio driving and turning instructions making navigation process more reliable. Handy plamtop computer design, making it more easy to hold and convenient to carry. CPU:SAMAUNG 266MHzARM920T Operation systerm:Microsoft WinCE.NET4.2 Core Version Numbers of signal receiver:8 precision of Locating:Less than 15mm Time of Locating:Cold start94s, Warm start37s, Hot start19s External Access:USB1.1 Storage:SD Card 256,512 Speaker: internal 2 W Earphone:3.5mm Internal Battery:1300mAh GPS Antenna: Central frequency 1575.42MHz&Length 5M/Imset high dilicacy GPS receiver(16 inceipt tanner. With outernal tanner jack. 32bit RISC CPU NEMERIX CHIPSET Installing accessory: Vihicle Fixer