10 Bitcoin mining rigs, model S21 200th. Used for only 7 months in a prepared location, protected from heat and humidity. Each device's monthly income is no less than 850 SAR at today's Bitcoin price. I guarantee them for one month, provided you have a prepared location for mining. Price per device is 4500 SAR. The model is considered one of the best in terms of income and usage. Special price for those who take the entire quantity.