China Ningbo Wellite Eletronic Co.,Ltd. is a leading professional manufacturer of PIR(Passive Infra-Red) sensor switch in China. Our products, wireless doorbell, are widely being used in automatic light control, promoting convenience, safety and cost-saveing. We employed Total Quality Management and established an ISO9001:2000 quality management system. With the belief that goods products and good service will lead us to the success. Wellite not only sells our existing products, wireless doorbells, modern wireless doorbell, remote wireless doorbell, decorative wireless doorbell, brass wireless doorbell, wireless musical doorbell, wireless pet doorbell, wireless video doorbell, wireless portable doorbell, wireless digital doorbell, but also provides complete developping solution for our customer.