The Viking Swallow Universal Smartphone Adaptor has a hassle free design that allows you to quickly and easily fit your phone to your optics. The universal design means it will fit phones with widths from 66-95mm wide and eyepieces from 33-60mm meaning it will fit most eyepieces on the market unlike many others. The simple and easy to use design means that with just a pinch it allows you to fit and remove the adapter in seconds. The small and robust design is ideal for taking anywhere and the simple intuitive design makes this a must have accessory.