Additional function: function jack, recording function.

Product specification: Current consumption: 13-33Ma;

Battery Usage: 9V6f22

Working time: 10-23 hours (according to sound intensity)

For four parts: 3 (100hz-700hz), 2 (700hz-900hz),

1 (900hz-1100hz), 0 (1100hz-1600hz);

Probe sensitivity: -60dB, maximum audio magnification: 25,000 times.

Set up accessories: one host, one probe, one headset, one manual headset.