5V Electronic Hourglass DIY Kit Funny Electric Production Kits Precise Electronic Hourglass Diy Kit With Led Lamps(12309) 5Pcs DIY Electronic Hourglass Kit Soldering Practice Spare Parts DC3.3 Electronic DIY Hourglass Module DC 5V Blue LED Funny Simple Production Sand Hourglass Kits. 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.