9417. The Abus RWM450 is a wireless smoke alarm with heat detector. It is ideal for use in the kitchen and other rooms and can be networked with other detectors (via radio). The unit is supplied with a non replaceable 12 year 3v lithium battery. . Alert for smoke and heat (one sensor for each). Non replaceable 3v lithium battery (12 years). Wirelessly link several detectors (via radio). LED status lamp