This is a high-performance replacement digital battery for the Empire DVU-PRS1 R1, guaranteed to meet or exceed the OEM specifications of your original. The digital battery is 1.61 x 1.4 x 0.37 inches. Manufactured by Empire Scientific, model number BLI-371. We offer a 1 Year Warranty with purchase. See this product elsewhere at a lower price? Call or email us; we have a Price Match Guarantee.