Holosun DRS-TH Digital Reflex Thermal Red DotNot available for US customers. If you place an order containing any Holosun items to be shipped to the US, it will be cancelled and a 5% cancellation fee applied. OVERVIEW The Holosun DRS TH (Digital Reflex Sight Thermal) redefines the boundaries of red dot optic technology. Using a 256x192 Thermal Sensor, the DRS Th fuses together your traditional red dot optic with a thermal overlay to give you the best of both worlds. Up to 10 hours of battery