Dimension: 3.5 x 1.5 x 0.75 in, 2 oz. (41 x 93 x 17 mm, 50 g)
One button operation.
Completely sealed; internal sensors.
Weatherproof (can be submerged 6 feet).
Replaceable Lithium battery (included and installed)
Stainless steel back.
Auto-off after one minute (can be disabled to remain on).
One year warranty