Changzhou CZZC  Electronics Co., Ltd is the professional manufacturer with a self-contained team of new products' research and quality guarantee..Our main products including:CCTV Products ,High speed dome , Buzzer, Speaker, Microphone, Ultrasonic Sensor and Piezoelectricity ceramic pieces. Such CCTV products as IP network high speed dome cameras, pressure high speed dome cameras and intelligent high speed dome cameras. Other products include indoor and outdoor pan/tilt cameras, indoor and outdoor camera housing, control keyboards, switches and controllers.