In recent years, frequent cases of lost children, positioning watches, few children could be lost, and the number of missing at least as much as it figures in stark contrast. Police said if you want to locate missing children, the first three hours is very important, but most parents and children can not provide accurate relative position. In order to avoid tragedies lost children, so that children wear children's intelligent positioning wristwatch is an effective means. (4) positioning accuracy and battery life (★★★★ ☆) bonbon bear watch uses GPS, WIFI base station location and positioning of advanced positioning technology, both outdoors and indoors, outstanding. Interior: There WIFI signal in place, when the mixed signal positioning, positioning accuracy of about fifty meters. If you simply base station location, gps positioning watches, larger error of about two or three meters. Outdoor: mixed signal location, about 40 meter accuracy, a GPS signal, the positioning wristwatch gps, meter accuracy. In the trial, the students locate small series watches, which are mostly mixed-signal positioning mode, the basic accuracy within fifty meters, within the acceptable range. During the trial period, location and under frequent interactions, battery persist for two days no problem, normal use of electricity can stick around for five days, really long standby. Student positioning watches, swim grace (certified), positioning watches offered by Beijing travel TU Technology Limited. Beijing Tour En Technology Co., Ltd. (www.bjyouen.com) (www.bjyouen.com) is the Beijing Haidian District, chemical instrumentation leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, the maximum meet customer needs. Well leader in travel with the staff warmly welcome all inquiries negotiations to create a better future tour grace.