One letter off from FLIR (the famous non-contact thermo imagining company now owned by Teledyne). I wonder if it is more than coincidence that FLTR almost looks like FLIR. Definitely not related
FLTR - No Contact Infrared Digital Forehead Thermometer - Walmart.com
Infrared Thermometer | FLTR
FLTR Infrared Thermometer | eBay
FLTR No Contact Infrared Digital Forehead Thermometer - Walmart.com