【Full Waterproof & Dustproof Bike Phone Holder】The bike bag has improved waterproof performance, using high-density waterproof fabric and waterproof zippers for strong waterproof performance even in sudden rain. You can attach a dedicated waterproof cover to reduce water ingress from gaps, and it also has excellent dustproof properties. Continue touring with peace of mind even in sudden rain. (Note: Do not get wet in the rain for a long time or immerse in water) 【Multi-Device Compatibility & TPU Touch Screen】 The touch screen uses TPU material, achieving high touch sensitivity. The bike phone holder is compatible with many models, and is applicable to large smartphones and all smartphones under 7 inches. Compatible models: IPHONE11, 12, 13, IPHONE11PRO, 12PRO, 13PRO, xs, GALAXY S20/S10/A5/S7, XPERIA 1/5/Ace, HUAWEI mate20/P30Pro, PAKUTEN MINI, AQUOS Sense3plus, etc. 【2L Super Large Capacity Bike Phone Holder】 In addition to smartphones, the bike bag has a 2L large capacity storage space, and can store cycling tools, mini pumps, batteries, wallets, etc. By installing an independent mesh pocket inside the bike bag, small items such as keys can be easily found. 【Small Functional Improvements】 ① With a sun visor: The top tube bag has a sun visor on the top, so you can see the screen even in strong sunlight. ② With shock-absorbing pads: Made of soft and thick sponge material, it securely fixes and absorbs shocks on bumpy roads. ③ Reflective marks on both sides: Improves visibility from cars at night, in the dark, and in rainy weather. Prevents accidents at night and increases safety. ④ There is a hole for inserting earphones at the end of the phone holder, so you can make calls, listen to music, and charge your phone during cycling. 【Easy Installation】 There are three Velcro straps, so it can be securely fixed. The length can be adjusted freely, and it is very easy to install and remove the bicycle frame bag. The length of the Velcro straps can be adjusted freely, and it is suitable for road bikes, mountain bikes, commuter bikes, and other top tube bags.