Buy on Amazon : br br Sony GPS-CS1 GPS Device for CyberShot Digital Cameras br br Keep track of where and when your digital photos were taken with satellite precision br No need for complex set-up or connection just turn on the GPS unit and check its positioning status br Holds approximately 360 hours 31MB of data equivalent to one month of tracking recorded at 15 second intervals br Up to 10 hours of use with alkaline batteries or 14 hours with Ni-MH batteries br Compatible with Cybershot DSC-S500 S600 S45 W30 W50 W70 W100 H2 H5 T30 and Sony Alpha DSLR-A100