The Gunwerks Revic BR4 Ballistic Rangefinder features the innovative Revic ballistic solver with advanced wind and earth based effects to provide accurate, ultra-fast corrections in MOA, MILS or the exclusive shoot-To-range for use with BDC turrets. The data rich display simplifies the shooting process and the improved ranging tools feature target discrimination and a new long range mode. Programmable via a connected Bluetooth device, and capable of over-the-air updates, the BR4 provides constant access to the latest software improvements Features Maximum effective range up to 4,000 yards On board ballistics solver Stores up to 10 ballistic profiles Bluetoot Mfg: Gunwerks