 Hi, my name is Ricky Chen, and I'm with the Commaweiser Learning. An important trend in mobile technologies is the popularity of cheap Android devices, such as smartphones, tablets, and mini PCs. Here are some examples. This is a 7-inch Android tablet with a single-core CPU, 512-mega background, and 4G storage. Last year, we purchased at a price of $68 USD. This is an Android mini PC with dual-core CPU, one-gay run, and 8-gay storage. The market price of this device is around $40 to $45 USD. This is another Wi-Fi hotspot with power bank built-in. This can be ordered from alibis-trash.com for $38 USD. In this course, we will show you how to build a complete offline, off-grade digital classroom with these devices step-by-step. See you in class. Thank you.