Ruby Technology Co., Ltd. was founded in 1996. We focus on designing, researching, developing, manufacturing and selling alarm system products, GSM alarm system,alarm systems,burglar alarm,GSM alarm,home security,security system,GSM burglar alarm,intruder alarm,GSM security system,home alarm system,vehicle tracker,security product,home security system,GPS tracker,wireless alarm,wireless alarm system,home burglar alarm,security alarm,alarm security,home alarm,smoke detectors, gas/CO/LPG detectors and all kinds of detectors. We have hundreds of self-developed designs and molds for our customers...