Opti-Logic 400 Yard Angle Compensated Laser Rangfinder w/ Internal LED Display, is a part of the high quality and dependable Range Finders from Opti-Logic. All of the features you need for a price you want. Range Finders from Opti-Logic are well known for their quality and Opti-Logic 400 Yard Angle Compensated Laser Rangfinder w/ Internal LED Display, upholds that standard.