Our company is the First Brand specialize in manufacturing lightbar,sirens and speakers ,LED/strobe/rotate light ,MOTO/AUTO accessories,LED screen,traffic sign, glove. shield. bullet-proof vest. 15 production lines, 865 employees and 50QC staffs our company have. 11 high engineer of our company can be you Technical Support Also free warranty period Call me let's talk more. +0086 (577) 88090011