Model Number: X45. Operating system: Google Android 4.2.2. JB Language: CZ, SK and more Processor: 1.3 GHz Dual core RAM: 512MB DDR3 Internal Memory: 4GB Display: 4.5 "LCD FWVGA Resolution: 480x854 px DUAL SIM: YES (2x standard size SIM card) Wi-Fi: 802.11b / g / n Mobile networks: 850/900/1800/1900 MHz WCDMA 2100 + Camera: 0.3 M Pixel front, 5.0 M Pixel with LED rear Control: Touch G-Sensor: Supported Expandability: 1x microSDHC (up to 32GB) Video: MKV (H.264 HP), AVI, RM / RMVB, FLV, WMV9, MP4 etc. Audio: MP3, MAV, OOG, AAC, AAC, APE, OGG, AC3 etc. Image: JPG, GIF, BMP, PNG etc. Email: Supported Communication: MSN, Skype, Google Talk, email, web browser, Youtube etc. Data: WAP2.0 / GPRS, EDGE, 3G, HSDPA, HSUPA Bluetooth: Yes FM Radio: Yes GPS: Yes Color: Black with white or black back cover Battery: Li-Ion 1600 mAh * warranty period of six months Power Supply: 5V (600 mA) Playtime: Up to 48 hours of normal operation Phone weight: 188 g Box dimensions: 172 x 102 x 50 mm