GPS ALTUS APS-3U L1/ L2 GPS + Glonass RTK Receiver
Description Altus APS-3U L1/ L2 GPS + Glonass RTK Receiver, w/ internal UHF Radio & GSM/ GPRS Modem, Removable SD Card, 2 LI-ION Battery Packs, 2 bay charger, Data and Power cables. Carlson Surveyor with 64MB/ 512MB, Color, Bluetooth-SURVCE GPS only. Shipping case for 2 receivers ( APS-3U or APS-3M)