Trident Case Electra Series for HTC EVO 4G - Black Total Protection Constructed from high impact-resistant polycarbonate and double-enforced with a shock absorbing silicone outer-ring. Extended Battery This bundle package includes the case as well as an extended battery made specifically for the EVO 4G which fits perfectly inside the case. The 2800 mAh nearly doubles the life of the device compared to the standard 1500 mAh battery. Clear PET Screen Shield Scratch-resistant, built-in PET screen protector shields screen from fingerprints, smudges, scratches and moisture while maintaining complete touch screen interactivity. Anti-Dust Design Dust protectors over microphone and speaker bays keep out dust and debris while the audio and power jacks are fully protected under silicone plugs when not in use.