無電 is read as むでん (muden) and means wireless.
むでん
muden
むせんでんわ
cordless telephone
むごんでんわ
silent phone call (form of harassment)
むりょうでんわそうだん
free phone consultation
とくていしょうでんりょくむせんき
special low power transceiver (wireless)
ぶにん
shorthandedness
むりやり
forcibly
むり
impossible
むちゃ
rash
むりょう
free (of charge)
ぶじ
good health
むしょく
without an occupation
むごん
silence (not speaking)