www.grover.com to create a Grover account if you are not a user already. Choose the tech you want to rent and then head to the online checkout.  **For first-time Grover users, enter your payment details for verification and then, after entering in your respective payment details, paste the voucher code in the top-right corner of your window screen. Once you’ve entered your voucher code, the offer amount will be taken off the total price so you can see how much money you’re saving. If some of the products on Grover's website are currently discounted, the voucher code will apply to the discounted price. However, vouchers cannot be combined.