stablished in 1998, DSW Audio & Security Co., ltd has specilized in manufacturing Piezo siren & Alarm, Electrical siren, Battery backup siren, Outdoor Siren, Home Alarm , strobe light , magnetic contacts , reed switches, Moled Speaker Box, Car Speaker, Loudspeaker and PIR sensor , motion sensor, control panel, Power supplier, CCTV power supplier as well as innovation electronic items in China.