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Features: ■ Model No.:Radio Tone RT4 ■ High Sensitive GPS antenna ■ Support:PTT ■ Support:GPS/BDS ■ Dimensions:130*56.5*34mm ■ Net Weight:260g (include battery) ■ Band:GSM: 850/900/1800/1900 (B2/3/5/8) ■ WCDMA: 850/900/1900/2100(B1/2/5/8) ■ TDD-LTE:2600/1900/2300/2600 (B38/39/40/41) ■ Sim Card:Dual SIM card dual standby (one is micro SIM) ■ Service Provide Unlocked ■ Shell Material Plastic ■ OS:Android 6.0 ;Applicable to other Walkie Talkie App ■ Applicable to other Walkie Talkie App ■ CPU:MTK6737, Quad Core 1.3GHz ■ RAM:2GRAM ■ ROM:8GB ROM, support TF card up to 32GB ■ Screen:2.4 inch QVGA capacitive touch screen, 320*240 ■ Data transfer:USB/Bluetooth ■ Mobile internet:WAP/WiFi ■ Camera:Double cameras, 2.0MP front camera, 5.0MP back camera ■ Message:SMS/MMS ■ Input:Handwrite/Keypad ■ GPS:Yes, also support A-GPS/BDS ■ WiFi:IEEE 802.11 b/g/n ■ Working time:Up to 20 hours ;Running on Zello App ■ Standby time:Up to 96 hours ■ Color:Black ■ Dual SIM card dual standby Other Features Email, Wallpapers, Calendar, Calculator, Clock, Play Store, Tethering & portable hotspot, etc Languages:English, Bahasa Indonesia, Bahasa Melayu, Cestina, Dansk, Deutsch, Espanol, Filipino, French, Hrvatski, Italiano, Latviesu, Lietuviu, Magyar, Nederlands, Norsk, Polish, Portuguese, Romana, Slovencina, Suomi, Svenska, Vietnamese, Turkish, Greek, Bulgarian, Russian, Ukrainian, Hebrew, Arabic, Thai, Cambodian, Korean, Simplified/Traditional Chinese Package: 1 x Radio Tone RT4 Smartphone 1 x RT4 Water-proof speaker 1 x 4600mAh battery 1 x USB cable 1 x GPS Antenna 1 x Charger 1 x User manual excellent, much bet