Holux RCV-3000 Bluetooth Data Logger USB GPS (Bluetooth, USB GPS, 66CH, WAAS, 200k Waypoints) HOLUX RCV-3000 Bluetooth GPS Data Logger is a total solution GPS receiver with Bluetooth and USB connection Battery Life: 20 hours 4MB Flash memory for 200,000 log data recording Holux RCV-3000 meets the requirement of field application, such as car navigation, mapping, agriculture surveying and security use under clear view of sky Size: 62.5  41  17.1 mm, Weight: 53 g Dual Bluetooth / USB Interface GPS Receiver function