Features: CPU: MTK6260 SIM Card Slot: Yes Network: 2G(GSM/GPRS) GSM Working Frequency: 850/900/1800/1900 MHZ WAP: Support Bluetooth version: 3.0 RAM: 128M ROM: 64M TF Card Slot: Yes(Support Max 16GB) Screen: 1.22inch HD Round LCD Touch Screen Screen Resolution: 240x240 Camera: No Battery: 3.7V/380mAh Lithium Polymer Battery Color: Silver/Black/Rose Gold Dial Size: 54x42.5x13mm Net Weight:55g G-sensor: Built-in Heart Rate:No Base Functions: BT Notification, Clock, Phone Call, Pedometer, Sedentary, Sleep Monitoring, Anti-lost, Bluetooth Call/Music, MP3, Recording, Contacts, SMS, Alarm Clock, Stopwatch, Calculator, Calendar, UV detection, Smart Wake.Key Features of Bingo T20 Silver Round Dial Smart Watch Bluetooth Wrist Watch Compatible with Android and IOSHome screen 1.22HD IPS, round screen 240*204Sleep monitor Record and analyse your sleeping conditionBattery capacity 380MAHAlarm clock, Calendar, Stopwatch, Calculator, RecordRF testing interface SupportBattery capacity 380MAHWorld Time SupportContact Sync to phone contactsBluetooth data-push Notifications of SMS,Wechat, QQ,News and many other apps.Touch Screen Capacitive touch screen