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Feature: Working voltage: DC3.3-5V or 3*AA battery Speed: Adjustable PCB size: 74.4 x 43.7 x 24mm Color: Blue LED Manual: Click here. Package includes: 5 x DIY Blue LED Electronic Hourglass Kit
Feature: Working voltage: DC3.3-5V or 3*AA battery Speed: Adjustable PCB size: 74.4 x 43.7 x 24mm Color: Blue LED Manual: Click here. Package includes: 5 x DIY Blue LED Electronic Hourglass Kit