The TomTom One GPS receiver has officially gone on sale in Germany, according to GPS Lodge and Engadget. The new unit from TomTom is based on the SiRFSTAR III chipset known for its low power consumption and ability to remain accurate amidst weak signals. The 4.3 x 3.5 x 1.3-inch unit features a 3.5-inch touchscreen at 320 x 240 resolution, SD card storage and integrated Bluetooth that allows users with Bluetooth-enabled phones to avail themselves of TomTom's Plus services, which include weather, traffic and voice downloads. Engadget reported earlier that the unit may feature a headphone jack allowing the playback of MP3's, but the One's built-in 32mb of RAM kind of shot that theory in the foot. The One goes for 399 Euros ($479) in Germany and no U.S. launch has been announced.