The AUX Box contains 4 IGU-16-AUX units. It can record up to four auxiliary signals with microsecond accuracy, using its external GPS antenna. The Aux signals (e.g. TBs, correlation pilots) are then offloaded by plugging each IGU-16-AUX into the DHR. Dimensions: 361 x 289 x 165 mm Weight: 6.5 kg