✔ *** Caution *** Make sure that the led cap you purchased is “sold by ATNKE and done by Amazon.” ATNKE is a registered trademark of the United Kingdom (UK00003322004) and other cheap resale products are not registered. With the same size, color, fabric or quality. We do not authorize any third party to sell “ATNKE” products, please select “Memorye”. ✔ USB RECHARGEABL & EASY-TO-USE: no longer re-purchase and change batteries for your light up beanie, only a standard USB port from the computer or mobile phone charger. press the button in the middle of LED light to switch on/off. ✔ CONVENIENT LOADING & WASHABLE: just need pull stocking cap rim open and push light inward to separate them and wash the cap or charge for the light,4 LED lights have high quality IP44 waterproof rating. ✔ ELASTIC & UNIVERSAL SIZE: this winter warmer LED knit hats can fit wide range of head sizes for most kids, men, women, with high elastic. ✔ FIT WITH: it is perfect flashlight beenie for camping,party,cycling, grilling, auto repair, fishing, jogging or walking with dog in the cold winter night.