2011 ML-N63 emergency conversion kit 1auto-test 2OEM order available 3energy-saving,no noise 4recharge/ ... , integrated circuits using intelligent control technology, having a long life, good reliability, etc.Suitable for hotels, factories, shopping malls, high-rise ... ≤15hBattery Type ≤1s Work ModeContinous.... 2011 ML-N63 emergency conversion kit