All models have chemical-resistant plastic construction, a red usage-indicator light for 3,000 actuated sprays,
a keyless "press and release" button for convenient refill, a can-out reminder and an alkaline battery life of 1 year
(spraying at 15 minute intervals 24 hours/day, 7 days/week, 52 weeks/year. 5, 15, 30 minute interval settings,
light sensor for "off" when lights are off.