The best part of this fashion cool bag is the luminous effect, the luminous smiley face pattern on the backpack could show its excellent fluorescence in the dark. If the light energy is insufficient and it is not very bright, please put it under any light source for a period of time to absorb the light energy (Warm Note: The pattern on the backpack can not glow when you receive it, because the backpack has been stored in the dark for a long time that the patter lack of enough energy.) | The Ideal Gift For DJ Lovers - Looking for the right gift for your loved one? well yes, you searched and this came up! Guess what! this is what DJ Music Lovers want! | You can easily and conveniently charge your phone or listen to music without opening up the backpack. Put your charging device into the backpack and connect the internal USB cable, then let your charging cable insert the external USB port to connect your electronic device. Connect your phone with inner headphone convert cable, then let your headphone insert the earphone port, enjoy the music!(We don't provide power charger, the power charger and earphone are not included in our backpack.) | Selection of wear-resistant nylon fabric and heavy-duty inner lining, durable zippers, adjustable padded shoulder straps, and free gift safety lock. Using environmental luminous powder, in natural light or light irradiation, it will show the luminous effect.（Warm tips: The earphone of the picture is not included in the item package, that's just a match effect.) | Electronic Music American DJ Tag Wristband Stainless Steel Adjustable Silicone Bracelet is the best partner with backpack, perfect gift for DJ fans.Male and female generic luminous backpack It is more attractive at night.