This electronic hourglass kit is good for those looking to practice their soldering skills and create their own unique hourglass. The flow rate is adjustable, allowing for adjustment to fit your needs. The kit can let you use necessary electronic components, fit your demands. Features -Color:Green -Material:Plastic -Size:7.50X4.30X0.10cm/2.95X1.69X0.04in -The flow rate is adjustable, allows for DIY work of the electronic hourglass. -Electronic hourglass pieces, need to make on your own, cultivate your hand-on ability. -This is a DIY electronic hourglass kit that is fun to make, also a good present choice. -This kit is not recommended for beginners as it requires technical knowledge and experience in electronics. -Small size, lightweight and portable, the solder practice for diy hourglass can be used very easily. Package list: 1 set x Hourglass DIY Kit