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BESTEK. via Amazon [amazon.com] has BESTEK Power Inverter DC 12V to AC 110V 300W Car Plug Adapter Outlet w/ 4.8A Dual USB Fast Charging Ports (MRI3011BU) on sale for $25.99 – $6.50 (25%) off when you apply promo code 22AGAK6A at checkout = $19.49. Shipping is free w/ Prime or on $35+ orders.

Product Details:[LIST][*]3″ x 1.8″ x 4.7″, 0.63lb[*]BESTEK Advantage Upgraded: Upgraded to 11-17V compatible with Tesla. It provides 300 Watts continuous DC to AC power and 700 Watts instantaneous power, featuring 2 AC outlets and 2 USB ports