5Pcs DIY Electronic Hourglass Kit Soldering Practice Spare Parts DC3.3 TOP! 5V Electronic Hourglass DIY Kit Funny Electric Production Kits Hourglass Kit DC 5V Electronic Hourglass LED DIY Kit Double Layer PCB Board Electronic Hourglass Diy Kit With Led Lamps(12309). Feature: Model: EH 30 Working voltage: DC3. 3 5V or 3*AA battery Speed: Adjustable PCB size: 74. 4 x 43. 7 x 24mmColor: Red LED Package includes: 5 x DIY Electronic Hourglass KitFinish assembly, for reference only.