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F-999B is a high sensitive partition monitor, which is perfectly constituted by metal receiver,
metal handset with superior detecting ability and high-quality headphones,
making it more sensitive and sound-qualified.
It owns built-in Lithium battery and unique FM transmitter function,
easy to be manipulated and carried
Electric Current Exhaust: 10mA
Battery type: 3.7V lithium-battery
Continuous monitoring for 100hours
Four Audio Choices: A (200MHz) B (800MHz) C (1200MHz) D (partition boogie monitoring)
Sounder`s sensitivity: -70db, the maximum times of amplifying
the audio: 2000 times
Penetrability: Cement wall, Steel wall, wooden wall, iron wall, glass and air brick
Answering patterns: Headphones, recording, wireless FM emission
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