220V Sound Sensor Light Switch – Auto On/Off, MR-SK50A

$7.38 $8.34

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Smart Sound-Activated Light Switch – Hands-Free, Energy-Saving Automation

Never fumble for a light switch in the dark again. The MR-SK50A Sound Sensor Switch automatically turns lights on the moment it detects sound — a footstep, a clap, or a voice — and switches them off again after approximately 45 seconds of silence. It only activates in low-light or dark conditions (≤10 Lux), so it stays dormant during the daytime and conserves energy around the clock.

Compact, durable, and easy to install, this intelligent switch is ideal for corridors, stairways, bathrooms, warehouses, storage rooms, and any space where hands-free lighting control adds convenience and saves electricity.

Key Features

Automatic sound activation: Detects sounds of 50–70 dB within a 6-metre range
Dark-only operation: Dormant in daylight; activates only when ambient light falls below 10 Lux
Auto shut-off: Light stays on for ~45 seconds (40 s ± 10 s) then turns off automatically
Wide voltage compatibility: AC 180–265 V, 50/60 Hz — suitable for most global mains supplies
Low load power: Supports up to 40 W (LED downlights, ceiling lamps, panel lights, standard bulbs)
IP22 waterproof rated: Splash-resistant construction for bathroom and utility-area use
Wide operating temperature range: -20 °C to +45 °C for year-round reliability
Compact form factor: 38 mm × 28 mm × 16 mm — fits neatly into standard switch housings
Energy-saving design: Eliminates lights left on accidentally, reducing electricity consumption
Made in Mainland China

Technical Specifications

Model	MR-SK50A
Input Voltage	AC 180–265 V, 50/60 Hz
Max Load Power	≤ 40 W
Sound Detection Range	50–70 dB (within 6 m)
Induction Delay	40 s ± 10 s
Photosensitive Threshold	≤ 10 Lux
Waterproof Rating	IP22
Working Temperature	-20 °C to +45 °C
Material	Plastic
Dimensions	38 mm × 28 mm × 16 mm

Compatible Lighting Fixtures

Works with LED downlights, ceiling lamps, panel lights, standard bulbs, and most other lighting appliances up to 40 W.

Ideal Locations

Corridors · Stairways · Bathrooms · Warehouses · Storage rooms · Garages · Utility rooms

What's in the Box

1 × Sound Sensor Switch (Model MR-SK50A)

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Frequently Asked Questions

Q: Will this sound sensor switch turn on the light during the day?

A: No. The MR-SK50A is designed to remain dormant when ambient light exceeds 10 Lux (typical daytime or well-lit conditions). It only activates its sound-detection function in dark environments, making it highly energy-efficient and preventing unnecessary daytime triggering.

Q: What types of lights are compatible with this sound sensor switch?

A: The switch is compatible with LED downlights, ceiling lamps, panel lights, standard incandescent or energy-saving bulbs, and other lighting fixtures or appliances with a load power of 40 W or less operating on AC 180–265 V.

Q: How sensitive is the sound detection, and from how far away does it work?

A: The sensor detects sounds in the 50–70 dB range (equivalent to normal conversation or footsteps) within a range of up to 6 metres, making it well-suited for corridors, stairways, and similarly sized spaces.

Q: How long does the light stay on after being triggered?

A: Once triggered by sound, the connected light will remain on for approximately 45 seconds (40 s ± 10 s). If no further sound is detected within that window, the switch will automatically turn the light off.

Q: Is this switch safe to use in a bathroom?

A: The MR-SK50A carries an IP22 waterproof rating, which means it is protected against dripping water and light splashes. It is suitable for bathroom ceiling installations where it will not be directly exposed to water spray or submersion.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.

We prioritize quality in selecting the materials for our items, choosing premium fabrics and finishings that ensure durability, comfort, and timeless appeal.

We strive to process and ship all orders in a timely manner, working diligently to ensure that your items are on their way to you as soon as possible.