4G LTE/WiFi Walkie Talkie PTT Phone. 2 Way Radio Smartphone with 4000 mAh batery, 2.8” TFT Touch Screen, GPS Tracking, Dual Camera 2/5MP, Quad Core Processor, 1GB RAM, 8GB ROM, SD card up to 64 GB supported. Specifications OS: Android 6.0 CPU: MT6737M Quad-Core 1.1GHz Band: 2G: 850/900/1800/1900 3G: WCDMA 850/900/1900/2100; TD-SCDMA 1900/2100 4G: LTE FDD B1/B2/B3/B4/B5/B7/B8/B17/B20; LTE TDD B38/B39/B40/B41; Memory: 1GB RAM + 8 GB ROM, DDR3 Display: 2.8 inch, TFT (240 x 320), capacitive touch screen, multi-touch Camera: Front Camera 2 MP; Main Camera 5 MP; Speaker: 36 mm speaker, 8 Ω, 2W Battery: 4000 mAh External SD card: max. 64 GB SIM Card Slot: Micro SIM 1 Slot GPS: Support Wifi/Biuetooth: Wifi (802.16 b/g/n/ac); BT 4.0; Interface type: Micro USB 2.0; support OTG; M6; Support External Earphone; Support External Camera; Dimensions: 124 x 62 x 27 mm Weight: 240g (including battery) Button: PTT; Volume; Capture; SOS; Power; Environment: Work Temperature 15 °C - +60 °C; Storage Temperature: -40 °C - 85 °C; Humidity: 20-90%; Warranty: 12 months Charging: USB Charger, 1.5A Fast Charging, Support Desktop Charger