At just 8.8 ounces and small enough to carry in your pocket or pack, the Pulsar Axion Key XM30 Thermal Monocular is proof that big performance can come in a small package. The Axion Key XM30 is built for reliable use, even in adverse conditions, with an all-metal, magnesium-alloy body and is waterproof rated IPX7, submersible in 3 feet of water for up to 30 minutes.