This masker is
similar in performance to the BTM2, except that
instead of a sleep time switch between A [1hour] and
B [8 hours], a rotary switch enables times of 1,
2, 4, 6 and 8 hours to be set. The last position
enables the BTM3 to be left ON as long as is required
and will not switch OFF until the user presses the
button once again.
SPECIFICATION:
Size: 95 x 60 x 25mm
Weight: 200 grams
Battery: PP3
Battery Life: [estimated] > 100 hours
Bandwidth: 2 - 5 kHz
Max Output: 75dB
