High sensitive capacitive touch screen, perfect match technology,1.54" tft hd lcd, resolution ratio: 240x240 pixel. Compatibility: All android and ios mobile phone and android tablet pc. Android mobile phone.

Phone Function: Make phone directly from the smart watch, including answering and dial-up.sim slot, single sim card (micro sim card) can be as a phone, support make calls by bluetooth or smart watch entertainment: mp3/mp4, camera.

Sync Function: qq,wechat, twitter, facebook, browser time, schedule, read text message, sport health: Pedometer, sleep monitoring, sedentary remind

Working mode: One is company mode (bluetooth), it enable to make phone or receive phone or send or get message etc via bluetooth. The other one is network mode (sim card inserted)

It enable to make phone and send or get message via the sim card you inserted which means at this time this watch works as a real cellphone.