【Durable and Secure】- The holder base is made from premium aluminum alloy, making it sturdy and durable. It effectively reduces phone jitter caused by uneven ground during riding. This bike phone holder built with an ultra-lock system that offers more security through additional locking of the case during extreme journeys.【Quick Lock & Release】- The bicycle phone mount is easy to install on the stem, allowing you to quickly attach/detach your phone in seconds with one hand. This ensures you won't miss calls or messages during cycling.【Perfect Viewing】- The bike stem phone mount allows you to get the perfect viewing angle and easily adjust the cellphone to horizontal or vertical screen. It is a great solution for having Google Maps visible to navigate, using a fitness app, and playing music while you ride.【Universal Adapters】- Our phone bike mount comes with one universal adapter, the high-viscosity industrial grade 3M double-sided adhesive tape can be strongly pasted to most cell phone cases.You can now use your phone to navigate or your Bluetooth speaker to enjoy music. Please note that Silicone / Rubber / Soft touch coatings cases are not suitable for this adapter!!!!!【New Upgrade of 2nd-Gen Product】- This product has been comprehensively optimized and upgraded: 1️⃣ An alloy module has been added inside the product, making it more stable, firmer, and more durable. 2️⃣ The buckle has been increased to four alloy buckles, which buckle the adapter in four directions, and the force is more evenly distributed.【Center Installation】: Conveniently installed in the middle of the bicycle stem, keeping your phone in front of you while riding. Simple installation requires removing just one screw, ensuring minimal handlebar space usage for additional riding equipment.The aluminum alloy base of the mount is bent at an angle of 10 degrees, which can avoid the limitation of the ultra-short STEM front protrusion on the support installation.【Lightweight and Compact】:The small and mini stem mount as light as a feather, seamlessly integrates with your bike, making you completely unaware of its presence. The mount weighs only 36g (1.25 ounces).【STEM Cap Shape Requirement】: If your bike has a round stem cap, then this phone holder is your best choice. Note: This holder does not support non-round stem caps. If your bike's stem cap is irregular, you can choose from our other holder styles(Stem Cap Mount).【Product Features】: Easy press for quick installation. 90-degree rotation for fast detachment. Choose between landscape or portrait format as needed. Compact appearance, lightweight design【Rich accessory ecology and usage scenarios】The C (Circle) series mount has 1st-gen (two buckles) and 2nd-gen (four buckles) products, adapters, protective cases, silicone elastic binding adapters, and stopwatch adapters All are standardized designs and can be used in gen1/gen2 products. Rich usage scenarios: cycling mounts, car mounts, desktop mounts, running (armbands or...