Campbell Scientific’s Archer-OBS-EM is a small handheld device with 512 MB of internal storage. You can carry the Archer-OBS to the field and display OBS-3A measurements, run surveys, and set up the OBS-3A for extended deployment. The Archer-OBS-EM includes a Juniper Systems’ Archer Field PC and Campbell Scientific’s OBS-Mobile software. (OBS® is a registered trademark of Campbell Scientific.)