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🔍 Unlock hidden sounds beyond walls — because what you don’t hear can’t be ignored!
The F999B Super Sensitive Listen Thru-Wall Contact/Probe Microphone Amplifier System is a professional-grade audio surveillance tool featuring ultra-sensitive -70dB sound detection, 2000x amplification, and four selectable frequency channels for penetrating various wall materials. Powered by a long-lasting 3.7V lithium battery, it supports up to 100 hours of continuous monitoring. Its versatile connectivity includes wired headphone output, recording compatibility, and a unique FM wireless transmission function. Packaged in a durable metal case with a 5-year warranty, it’s engineered for discreet, reliable, and portable use in advanced sound detection scenarios.
| ASIN | B07MVZSR1P |
| Audio Input | 3.5mm Audio Cable, Wireless FM Emission |
| Best Sellers Rank | #2,210 in Home Security Systems |
| Brand | hotsell999 |
| Color | Silver |
| Compatible Devices | Headphone, Headset |
| Connectivity Technology | Wired |
| Connector Type | 3.5mm, Charging |
| Customer Reviews | 1.0 out of 5 stars 1 Review |
| EU Spare Part Availability Duration | 5 Years |
| Manufacturer | 754914036401 |
| Mfr Part Number | 754914036401 |
| Mounting Type | Wall Mount |
| Number of Channels | 4 |
| Power Source | Battery Powered |
| UPC | 754914036401 |
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