Call safe is the new Personal Safety Alert System that lets you preprogram up to five telephone numbers to call in case of an emergency.Control unit calls up to five friends or family members to alert them of an emergency situation. 1.This product is specially designed for: Elderly Individuals with know medical coditions Family members with high risk of falling patients recovering at home 2.The Panic Pendant uses a 315mhz wireless signal to communicate with the Control Hub and has a range of 100 meters (measured in open space) 3.Control Hub is powered by AC/DC adaptor and 3AAA batteries in case of black out. 4.Panic Pendent is powered by A23-size battery 5.Pre-program 5 emergency phone numbers 6.Record own out-going message Twinpro International Holdings Limited,is the best solution to your needs for wireless communication products,bluetooth products. Our engineer with over 10 years of developing experience. Twinpro has the expertise and experience in providing ODM products and services. Our ODM service includes Research and Development, Product Design, Engineering Expertise and Manufacturing of the actual products. With a diverse and experienced group of industrial designers, engineers and product managers, we provide strategic solutions to a wide range of product development needs. Twinpro's mission facilitates reduced tooling, labor and manufacturing costs, quick delivery to market, and above all, client satisfaction. At the same time, we have some open items products for your choose, if you are interested, please contact with us!