Hunting style slider sight from Apex Gear. Key features: Ultra smooth adjustment. Gravity line rotational adjustment. Easy to see, rear facing yardage tape - with over 120 pre marked tapes included. Push button brightness control for use in all lighting conditions. Adjustable second and third axis. Ambidextrous design. 700 hours of battery life and power saving, auto shut-off after 4 hours without adjustment. Adjustable green and red LED.