Model OTC-E966 Chip MTK6761 Quad-Cor OS Android 8.1OS(Later 10.0OS Memory 2GB +16GB （Optional 3GB+32GB T-card T-card (Option), up to 32G Main screen 4-inch LCD touchscreen 854 x 480dpi 16M color IPS TF Sensor Light Sensor,G-Sensor,3D Sensor, Proximity Senso GPS Yes, support GLONASS,GPS,A-GP Battery 4500mAh Li-io Standby time 72hour Charger Type- OTG Suppor WIFI Support 2.4G and 5 Bluetooth Suppor Front& Rear Camera Back:8M with focus.Front:5M.Flash Light: real ligh Earjack Interface Type M6 Connecto Mic Dual Mic with one noise reduction MI Multi-languages All Language Network(GSM,WCDMA,FDD,TDD) GSM:B2/B3/B5/B WCDMA:B1/B2/B4/B5/B FDD-LTE:B1/B2/B3/B4/B5/B7/B8/B12/B13/B14/B17/B20/B28(AB TDD-LTE:B38/B39/B40/B4 SIM Type Dual Micro SIM car Dimensions(L*W*H) 142.5 x 72.5 x 25m Operating Temperature -20℃ ~ 60 Humidity 20 ~ 90 Weight 311 Waterproof IP6 Drop 1.5 keys button PTT,SOS,Channel Knob,Power,Volume,Smart Key(DMR/POC)