Portable: What does the flashing light mean on the power indicator? June 11, 2024 19:08 The flashing amber lights on the power indicator show that the device battery is low and you need to recharge it. Related articles Portable: Will the SlumberCalm™ Portable Sound & White Noise Machine fit in SlumberPod’s pocket? At Home: Does the SlumberCalm™ 2-in-1 Sound Machine & Night Light need to be plugged in to use it?