Made of fireproof plastic, flame retardant, anti-corrosion, anti-oxidation, durable. Skillful manufacture, the perfect combination of materials and structures. Removable battery, 24 hours uninterrupted protection. Compatible with a variety of models of the alarm host combine other sensors. Exquisite craftsmanship, fashion generous, flash tone warning, full of power, scare away the thieves, guard your home safe. Intelligent monitoring, make your life better.