Dear users, thank you for buying our SY-1 Series Swimming Pool Alarm. This product has filed an appearance patent (patent No.:2007301307785). It looks artistic and sleek, besides, it is solid, safe, easy to install and use, worthy of an ideal choice for you.  SY-1 Series Swimming Pool Alarm is a high-tech, high-quality and high-sensitivity product, user must strictly comply with its operating procedures and requirements. This product has passed CE, ROHS certifications. Some parts have passed FCC, TUV certification.  As a safety preventive product utilizing technologies of electronic testing, SY-1 Series Swimming Pool Alarm is used to detect the children and animals falling in the swimming pool under monitoring. Its principle: when the detector of extension installed by the swimming pool detects the waves generated by object of heavier    than 6kg falling into water within a range of 6m , it will immediately alarm and send RF, send the wireless signal that it detected to other extensions of the swimming pool (if the swimming pool is configured 2 sets of extensions or more) and indoor host simultaneously. Alarm of indoor host: 30cm distance, volume: 90DB or so, red LED display and alarm; alarm of outdoor extension: 1m distance, volume: 90DB or higher, 3 red LED display and alarm. (The system can activate the lighting system, video transmission / display, video storage system and other system will start up synchronously, in order to show the scene of swimming pool when alarm happens, however, the ripple produced in windy, rainy weather will not trigger such an alarm. In this alarm system, the alarming extension is able to test low voltage of outdoor extension and system fault by itself, thus ensure the safety of swimming pool even without people on watch. Once emergency occurs, it can send out alarm within 8-12 seconds. If there are more than one such alarm systems in a community, each alarm system will work independently and will not disturb each other. If users forget to set on alarm after s etting it off, don't worry, the system is able to automatically set on the alarm within 5 minutes. This product is very solid, it can relieve the damage possibly occurring during disassembly or transportation. What's more, it is able to resist attack of UV.