This is the best warmer to slide into pants pocket, provide all day warmth. Exclusive to Retailers – the UT3 LITE PLUS is an enhanced version of Ocoopa’s UT3 Lite[NONE PLUS], Ocoopa's all-time best-selling non–power bank model. Compares to Amazon model, This retail-exclusive edition delivers superior performance in extreme cold and is not sold on Amazon or online. Packaging clearly identifies its in-store exclusivity. - Heats up in just 3 seconds - Superior performance in 30°F (-1°C) or below - Best grip for sliding into pants pockets - 3 heat levels Ocoopa is the only dedicated rechargeable handwarmer brand focused on complementing your lifestyle. With over 4 million users worldwide, we bring the perfect palm of warmth to everyone.