noun which may take the genitive case particle 'no'
cordless
Describes devices that operate without a power cord, such as phones, vacuum cleaners, or power tools.
コードレス掃除機はとても便利だ。
A cordless vacuum cleaner is very convenient.
新しいコードレス電話を買った。
I bought a new cordless phone.
ワイヤレス is broader, covering any wireless technology (radio, Wi-Fi, Bluetooth), while コードレス specifically means no physical power cord.
Loanword from English 'cordless'.