A sound machine changes what is played in the room; it does not soundproof the room or guarantee a sleep result.
Use the lowest comfortable level
Begin quietly and keep the unit on a stable, dry surface away from bedding and liquids.
Keep controls physical
The Lowtone concept uses a dial, sound selector, and timer buttons without an app, radio, or subscription.
Do not skip production evidence
The is blocked until supplier identity, electrical design, plug and voltage, adapter requirements, battery status, instructions, applicable safety and EMC evidence, warranty, and returns handling are verified.