Velleman MK120 IR LIGHT BARRIER
Applications : announce visitors, warn against burglars, set boundaries, science projects,...
audible (85dB) and visible (LED) alert
range: 1 to 4m (3.3ft to 13ft)
on/off switch provided
transmitter: 9VDC / 50mA max.
receiver: 9VDC / 20mA max.
9V battery holder and adapter jack included
transmitter: 55 x 40mm / 2.2 x 1.6"
receiver: 100 x 50mm / 3.9 x 2.0"
not recommended for outdoor use