Burris 300675 BTC 35 V2 - A Thermal Clip On/Handheld/Mountable Matte Black 1-4X35mm Multi Reticle 400X300, 50Hz Resolution Zoom 1X/2X/4X, Includes SS#120623 The Burris Clip-On V2 turns Your Traditional Riflescope Into a Thermal Optics. The BTC V2 offers Adaptability With 1X, 2X And 4X Power Zoom capabilities And a Selection Of Five Vivid Color palettes. The Burris Clip-On Allows You To Identify Thermal signatures Up To 750 yards Out. Mounting options- M33.5 X 0.75 Threaded Eyepiece SmartClip, 1/4-20 Interface For M1913 QD Mount. Includes SS #120623. Specifications: - Magnification: 1-4X - Objective: 35mm - Field Of View: 7.80 -5.90 Degrees @ 100 yds - Battery Size: Cr123/16340 - Weight: 16.20 Oz - Focus Range: 750 yds - Resolution: 400X300, 50Hz - Diopter Adjustment: -4/+4 - Battery Life: 2+ Hrs