Meets CE, RoHS, FCC, and ASTM standards With adjustable sensor tube, applicable for different pool level Main unit works on dry battery and has a low battery alarm The batteries (not included) of main unit can last 18 months Alarm sound level is 100dB Detect a child weight at least up 6kg (8 months old) The detection reacted the alarm within 3 to 12 seconds Works with pool standard 5 x 10m, not more than 6 x 12m Wind-resistance is very good and no false alarm 120 meters in-house remote receiver with warning light Five LED lights on the main unit indicating different status Completely waterproof, protection grade IP65 Intellectualized control for swim, reset, and off mode