4 X 370+KH/S (Total about 1500KH/s) Miner Combo Kit! The USB Hub powers the USB cable. It is recommended that customers plug in the Power plug before use to ensure sufficient power!(Power plug not included) Customers are advised to use a fan to blow air from the side to achieve better heat dissipation and maintain system stability.(Fan not included) High efficiency: Low consumption greatly reduces your cost! Due to different batches, there may be differences in product appearance, color, and printed text, which will not affect the use. Colour:Gray & Black Material:Plastic+Metal Package Contents: 4 * Miner(the color of the pin sleeves is random, and the designation is not accepted. appearance may vary from batch to batch) 4 * USB Adapter (appearance may vary from batch to batch) 1 * USB HUB (appearance may vary from batch to batch)