It's never a good idea to guess with measurements, that's what measuring tools are for. There's no cord to restrict you, just make sure you've charged the battery.
From ManoMano
Stanley Intelli Tools STHT77594-1 360 Cross Line Laser (Green Beam) INT177594
Rapid Online
Stanley Intelli Tools STHT77594-1 360° Cross Line Laser (Green Beam)
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