With an IP68 certification, the CAT B35 is fully dust and waterproof. This means you don't have to worry when you drop your device in the water. On top of that, the mobile phone is shockproof, which means it'll survive a large drop. Apart from the sturdy casing, the B35 has all the comforts of a mobile phone. The device has a camera, a dual SIM functionality, and a large battery. Thanks to the dual SIM support, there's room for 2 SIM cards in the phone, and you can be reached on 2 telephone numbers. With a 2,300mAh battery capacity, the battery can easily last a couple of days.