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UINEER Global Flagship Store via Amazon [amazon.com] has Uineer Tri-Mode Wireless Rechargeable Bluetooth Mouse (Black) on sale for $17.99 – 50% off when you apply promo code U6500902 at checkout = $8.99. Shipping is free w/ Prime or on orders $35+.

Note: Amazon promo codes don’t always apply seamlessly. If you run into this issue, try refreshing the page, re-entering the code, or checking after you select a payment method to confirm whether it already applied.