BlackBerry Z10 Tough Survivor Military Hard Rugged Dirt / Shock Proof Defender Heavy Duty Case Keep your BlackBerry Z10 safe and protected in style. Display shield deflects wind and rain (Test: up to 200 mm/hr for 1 hour). Protects your mobile phone against scratches, dirt, fingerprints and other daily damages. Sealed ports block blown sand and dust (up to 18 m/sec for 1 hour) Silicone cladding blocks vibration(18 hrs at 20 to 2000 Hz). Silicone cladding blocks vibration (18 hrs at 20 to 2000 Hz)