5Pcs DIY Electronic Hourglass Kit Soldering Practice Spare Parts DC3.3 5V Speed Adjustable Electronic Hourglass Diy Kit With Led Lamps(12309) S3617f5a9bc0f4c8bb4e9802233dfc636a.jpg DC 5V Electronic Hourglass LED DIY Kit Double Layer PCB Board TOPMAO DC 5V Electronic Hourglass DIY Kit Funny Electronic Production. 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.