Spy 3 is the world's smallest detector offering concealed protection for rooms and supporting various other control and access applications. It is flush-mounted in a wall, providing coverage of six double-beams in a single detection layer, with a maximum coverage area of 8m/100o (25ft/100o).

Despite its miniature size, the Spy 3 detector achieves full-size performance by implementing state-of-the-art detection technologies. Backed by 30 years of Visonic expertise, Spy 3 offers industry-leading sensitivity and reliability levels while virtually eliminating false alarms. Designed for ease of use, Spy 3 is easily installed in any home, office or other commercial environment. It is installed so only the lens is visible – rendering the detector virtually unnoticeable.