Digital Enhanced Cordless Telecommunications (DECT) is one of the most common standards for cordless telephones. Electric mowers are further subdivided into corded and cordless electric models. Home models are available in corded or cordless versions. Battery driven devices such as cordless hand drills are generally use brush torque motors. Makita created the 18V Lithium-Ion cordless tool category in 2005. In addition to cordless screwdrivers, cordless impact wrenches, cordless rotary hammers and cordless hammer drill. The lifter allows cordless headsets to be used remotely with such phones. Some digital cordless telephones operate in this band too. TriVac leaf blower/vacuum and the Eco cordless lawn mower. This is designed for cordless phones to work using Bluetooth. Older generations of both cordless and mobile phones used analog technology. Eureka manufactures a variety of vacuum types including uprights, cordless and hand and stick vacuums. Devices implicated include fluorescent and low-energy lights, mobile, cordless/portable phones, and Wi-Fi. This included spectrum for cordless phones and Wi-Fi. For example, signals from cordless phones or routers may affect signal strength.