The TS500 Ultrasonic Test Set is a self-contained, handheld test set for testing low frequency underwater acoustic beacons. It is a battery operated heterodyne type receiver which operates at frequencies of 8.8 kHz and 37.5 kHz.
规格：
Weight:
13 oz (368 g)
Dimensions:
3.3 x 6.5 x 1.2 in (8.4 x 16.5 x 3 cm)
Power Supply:
9 volt battery
特征：
Battery operated
Heterodyne type receiver
8.8 kHz and 37.5 kHz frequencies
