From Longman Dictionary of Contemporary Englishcordlesscord‧less /ˈkɔːdləs $ ˈkɔːrd-/ adjective 
TEEa piece of equipment that is cordless is not connected to its power supply by wires a cordless phone a cordless drill
TEEa piece of equipment that is cordless is not connected to its power supply by wires a cordless phone a cordless drillExamples from the Corpus
cordless• Normally priced at £19.95, we have 10 Free Curl cordless combination Brush and Tong stylers to give away!• Cutting ability of the trimmer is better than would be expected of a cordless machine.• If you're set on getting a cordless mouse Logitech's contender must be seriously considered.• A cordless one offers a solution.• I was in the shower when Aida brought me the cordless telephone.• The cordless version uses the VersaPak rechargeable battery system. 