SKF Group SKF TMST 3 Electronic Stethoscope 电子听诊器
Frequency range ：30 Hz–15 kHz
Operating temperature ：–10 to +45 °C (14 to 113 °F)
Output volume： Adjustable in 32 levels
Led indicator ：Power on
Sound volume
Battery low
Maximum recorder output ：250 mV
Headset ：48 ohm (with ear defender)
Auto switch off ：Yes, after 2 min.
Battery： 4 ™ AAA Alkaline type IEC LR03 (included)
Battery lifetime ：30 hours (continuous use)
Dimensions handset ：220 ™ 40 ™ 40 mm (8.6 ™ 1.6 ™ 1.6 in.)
Probe length ：70 and 220 mm (2.8 and 8.7 in.)
Case dimensions ：360 ™ 260 ™ 115 mm (14.2 ™ 10.2 ™ 4.5 in.)
Weight
Total weight：1 600 g (3.5 lb)
Instrument：162 g (0.35 lb)
Headset：250 g (0.55 lb)
SKF Group SKF TMST 3 Electronic Stethoscope 电子听诊器
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