Yesido C331 360 Degree Adjustment Mechanical Locking Bicycle Phone Holder(Black)1. Mechanical locking, stable and not shaking: mechanical fixing method is adopted, the bracket is locked with one button, the mobile phone is easily fixed and will not fall, and it is easy to deal with bumpy roads. 2. One second pick up and release: one button opening, easy to take, and one handed operation. Mechanical structure design, no jamming, four corner silicone full protection, will not wear the mobile phone. 3. Universal adjustment: 360