Kelm offers Sentia, a self-cleaning UV-C toilet sanitizer combined with a motion-activated night light. Designed for everyday bathroom use, the device mounts with an adhesive strip beneath the toilet lid and works automatically: closing the lid starts a UV-C cycle, while its soft light turns on when someone approaches. The sanitizer is designed to operate only when the lid is closed and complements, rather than replaces, regular cleaning.

Sentia offers three brightness settings, fits standard round and elongated toilets, and recharges via USB-C. Kelm says a charge lasts about 60 days with normal use and takes around two hours to recharge. Installation requires no tools or plumbing work, and the device has no app or controls to manage in daily use. The brand sells the product individually and in discounted multi-unit bundles, with UV test cards and extended warranty coverage included in selected offers. Kelm also provides free standard shipping with tracking and a 60-day trial, with refunds available for products returned in good condition.