BLU Energy X LTE - 4000 mAh Super Battery - GSM Unlocked - Gold 5.0 HD display, 8.5mm thin and full metallic Uni-body 4,000 mAh super battery that lasts approximately 3 days with standard usage and over 30 days on standby with just One charge MediaTek Quad Core 1.3 GHz Processor with mali-t720 GPU, 16GB Internal memory 1GB RAM Micro SD up to 64GB 8MP Main Camera + 5MP Front Camera with built I F2.4 Aperture and Blue glass filter 4G LTE with CAT4, (2/4/7), 4G HSPA+ (850/1700/1900/2100). GSM Quad band: US compatibility Nationwide on all GSM Networks including AT&T, T-Mobile, Cricket, Metro PCS, Straight Talk, Pure Talk USA, and others