Features: NOT INCLUDED BATTERY PACK, OUTPUT POWER 5V 2.1A, FOR HEATING VEST. Removing the battery pack before washing. This USB powered heated vest features intelligent four control technology, precisely adjusting heat intensity across 28 zones for warmth in freezing conditions. Engineered with lightweight polyester fiber and USB compatible design, the unisex heated vest offers breathable warmth, for active wear with movement flexibility. Heated vest with 3 level intelligent control adjustment, over the core body areas (shoulder neck, back, left/right stomach, total main control ). Zipper pocket, elastic cuffs, water resistant USB/Direct Current interfaces, filled with quality cotton fleece. 5V and 7V safe working voltage,fast heating. Set up a protection system to ensure that it heats up fast in second and protected from current, overheating. Practical resin hinges can withstand opening and closing operations. Support hand / soft machine washing. Suitable for outdoor sports, winter warmth, travel and other occasion, providing a comfortable and warm experience. Specifications: Component: Polyester fiber Optional Color: Black,Red Optional Size: app. (Chinese Size,follow the size chart) Size:S Length:68cm(26.77inch) Shoulder:42cm(16.54inch) Bust:108cm(42.52inch) Size:M Length:70cm(27.56inch) Shoulder:43.5cm(17.13inch) Bust:112cm(44.09inch) Size:L Length:72cm(28.35inch) Shoulder:45cm(17.72inch) Bust:116cm(45.67inch) Size:XLsize Length:74cm(29.13inch) Shoulder:46.5cm(18.31inch) Bust:120cm(47.24inch) Size:XXL Length:76cm(29.92inch) Shoulder:48cm(18.90inch) Bust:122cm(48.03inch) Size:XXXL Length:78cm(30.71inch) Shoulder:49.5cm(19.49inch) Bust:128cm(50.39inch) Quantity: 1pc Package Includes: 1pc Heated vest note: Please allow 1-3cm error due to manual measurement. please sure you not mind before you bid. Due to difference between different monitors, the picture may not reflect the actual color of item.