HY929 Seismic Contact Microphone Wall Floor Listening Device

Key features

1. Listening through walls and other partitions – A high-sensitivity probe picks up vibrations transmitted through walls, doors, floors, and other structural elements, allowing you to listen to sounds from adjacent rooms.

2. Two probes for different applications – A stethoscope microphone for working on solid surfaces and a needle microphone, which enables listening through crevices, ventilation openings, or insulating materials.

3. Adjustable reception sensitivity – Two gain levels allow the device to be adapted to working conditions – from standard listening to receiving very weak sounds.

4. Recording to a microSD card up to 32 GB – The included recorder allows you to save the received sound directly to a memory card, so recordings can be played back or transferred to a computer later.

5. Real-time listening – By connecting headphones, the user can listen to the received sounds without delay.

6. Simple operation – The device is ready to work after connecting the selected probe and turning on the power – it does not require app installation or configuration.

7. Built-in battery – Power from a 350 mAh battery ensures mobility and allows you to use the device without the need for constant connection to a power source.

8. MP3 player – The recorder allows not only to listen to recorded audio but also to play MP3 files saved on the memory card.

Listening through walls

Advanced seismic technology enables effective detection of vibrations and sounds penetrating through walls, doors, and other partitions.

Thanks to the probe's sensitivity reaching –70 dB and signal amplification up to 20,000×, the device enables reception of even very quiet sounds.

The set includes two interchangeable probes – a stethoscope microphone for working through solid surfaces and a needle microphone, ideal for listening through crevices and hard-to-reach places. 

This versatile solution will work wherever precise sound detection is important.

Device components

Seismic listening device:

1. Listening mode switch

2. ON/OFF knob – Turns the device on/off

3. Probe connection port

4. Device charging port (USB-C)

5. Device operation indicator light

6. Headphone connection port (Mini Jack)

Sound recorder:

7. Headphone connection port (Mini Jack)

8. ON/OFF button - Turns the device on/off

9. Memory card slot

10. Device operation indicator light

11. "+" and "–" buttons for fast-forwarding recordings

12. Device charging port (USB-C)

Technical specifications

Seismic listening device:

• Current consumption: Approximately 15 mA
• Power supply: 3.7 V lithium battery
• Battery capacity: 350 mAh
• Probe sensitivity: Approximately –70 dB
• Maximum sound amplification: Up to 20,000×
• Signal penetration: Through cement, steel, and other structural elements
• Charging time: To 90% – approximately 3 hours, full charge – over 12 hours
• Dimensions: 59 x 57 x 22 mm
• Weight: 62 g

Sound recorder:

• Memory card support: Up to 32 GB (we recommend class 10 from reputable manufacturers, formatted to FAT32) (not included)
• Recording format: MP3
• Charging: DC 5 V / minimum 300 mA power adapter
• Charging time: Approximately 3–5 hours
• Battery capacity: 220 mAh
• Recording time: Approximately 5–6 hours
• Current consumption during recording: Approximately 40 mA
• Playback time: Approximately 6–7 hours
• Current consumption during playback: Approximately 35 mA
• Dimensions: 40 × 44 × 22 mm
• Weight: 20 g

Set includes

• 1x HY929 Wall Seismic Listening Device
• 1x Sound Recorder
• 1x Headphones
• 1x Stethoscope Microphone
• 1x Needle Microphone
• 1x Charging Cable
• 1x USB-C Power Adapter
• 1x User Manual

Before using the device as a listening device, we suggest familiarizing yourself with the legal restrictions.