The main features of the Callaway LR 550 Rangefinder are:
- Fast, simple, one-touch operation
- Nikon's First Target Priority Mode
- High-Eyepoint Design
- Multi-coated Optics
- Waterproof & Fog-Proof
- Long Eye Relief
- Focusing Diopter
- LCD Display
- Capable of distancing different targets in succession, for up to 8 seconds, by keeping the button pressed
- Reticle allows use to know ranging in progress
- 1/2 Yard increment Reading on LCD
- Compact, lightweight design
- Sport Case with Removable Travel Cover for Objective and Eyepiece.
- Measurement Range (yd): 11-550
- Increment Reading (yd): 1
- Effective Diameter of Objective Lens (mm): 21
- Viewfinder Display: LCD Display
- Magnifications: 6x
- Field of View: 6 degrees
- Exit Pupil (mm): 3.5
- Eye Relief (mm): 18
- Diopter Adjustment (m): +/- 4
- Color: Yellow
- Power Source: 1 CR2 Lithium Ion Battery