Zello walkie talkie phones mobile android smartphone 4g yanton Walkie Talkie YANTON T-X100 Android 9.0 Front and rear cameras Built-in Wifi/Bluetooth/GPS Smart touch display Dual SIM card slot TF card slot NFC function Radio Model X100 Operating system Android 9.0 Dimensions (H*W*D) 145mm*65mm*34mm (excluding antenna and back clip) Weight 261g Working temperature -5°C ~ 55°C Storage temperature -20°C ~ 70°C Waterproof level IP54 Frequency European version GSM: B2/B3/B5/B8 WCDMA: B1/B2/B5/B8 TDD-LTE: B38/B39/B40/B41 FDD-LTE: B1/B3/B5/B7/B8/B20/B28A/B28B America version GSM: B2/B3/B5/B8 WCDMA: B1/B2/B4/B5/B8 TDD-LTE: B38/B40 FDD-LTE: B2/B4/B5/B7/B8/B12/B17/B28a/B28b/B66 WiFi IEEE 802.11/b/g/n (2.4G and 5G) Bluetooth BT4.2 GPS GPS, AGPS NFC Support Hardware CPU MTK6739 Storage capacity 1GB (RAM) 8GB (ROM) Memory capacity supports up to 32G SIM card slot Dual card slot USB Micro USB2.0 Earpiece Connector TK plug Screen display 2.8 inches touch screen Resolution TFT 480*640 Camera Front camera: 8.0MP Rear camera: 13.0MP Flashlight LED flashlight Speaker Ø36mmSpeaker，8Ω 2W Microphone Dual microphone, noise reduction Battery 4000mAh Work time 16 hours Standby time 20 hours