... .Adopt high quality Ni-Cd battery which own high power capacity.2.Long work life ,the work times more than ... Below right cornerTechnical parameterPowerEmergency time2*5W2.5hoursApplication,Widely used in emergency system of hotel ,meeting room,office,hospital,factory ... 500pcs: 10days, 500~1000pcs:15days3.Sample can be delivered in 3days4.Shipping freight are quoted under your requests5.Shipping ...