Model: MT851B
Warranty: 2 years


Specification:
• Frequency GSM: 850/900/1800/1900
• Card ID: microSIM without PIN
• Display: mono LCD 0.98"
• Audio: microphone and speaker
• Sensors: gravity, contact
• Battery: Lithium-Polymer 3.7V 400mAh
• Interface: Micro USB 2.0
• Power: 5V 0.5A
• Supported by Android 4.2, iOS 6.x and later
• Weight: 39g
• Diameter of the wrist: 35 ~ 55mm

Note: For proper operations a SIM card is required (with disabled PIN). 
Estimated data use: approx. 30MB / month, depending on the intensity of use watch.