PB-TK SERIES Featuring the patented ‘double modulation’ technology for unsurpassed immunity to sunlight and artificial light sources, Twin Beams are ideal for protecting windows, doors, fence lines, entrances, and driveways. 2 x Synchronised high power beams Double modulation for unsurpassed light immunity Auto-gain control (AGC) 50,000 lux sunlight immunity IP55 housing