GSM Unlocked for call and text (needs a microSIM card) Please note that the watch is not compatible with CDMA networks (like Sprint and Verizon) and is not compatible with AT&T. T-Mobile is the best match for this device in the US. Add up to 10 phone numbers into the phonebook on the watch Built-in Speaker Built-in Microphone Voice Messages Positioning is available when a GSM SIM card is inserted Set SOS numbers Add phone numbers to call family and friends Alarm Clock Stopwatch -------------------- Specifications: CPU: MTK6261D OS: Android; compatible with iOS ROM/RAM: 32MB+32MB Touch Screen: 1.44 in LCD; 128 x 128 pxls Battery: 3.7V/250mAh Li-polymer battery Standby Time: 120 hours GSM: 850/900/1800/1900 SIM Card: Micro SIM card Product Dimensions: 1.84" x 1.5" x 0.51" Weight: 1.16 oz Material: Plastic, TP, silicone Package Includes: smartwatch, USB cable, user manual Warranty: 1 year

GSM Unlocked for call and text (needs a microSIM card) Please note that the watch is not compatible with CDMA networks (like Sprint and Verizon) and is not compatible with AT&T. T-Mobile is the best match for this device in the US. Add up to 10 phone numbers into the phonebook on the watch Built-in Speaker Built-in Microphone Voice Messages Positioning is available when a GSM SIM card is inserted Set SOS numbers Add phone numbers to call family and friends Alarm Clock Stopwatch</li