I am not sure if "smart label" is only mark for watch connected to phone ? This watches have no communication, but you can connect unlimited IIC sensors, (humidity, pressure, temperature, compass, ADC, DAC) Watch have speech output with talkie library. They are designed to work with minimum components and easy assembly. 2x 4.digit segment display OSK4028A-IR super small multiplexed SMD display Features: - optional DS3231 or RX8130CE rtc - atmega timer2 async soft RTC - 2x smd display 2 lines !! FUNCTIONS time date seconds calendar temperatures RTC, CPU timer2 in async mode battery voltage RTTTL melody player Alarm 1, configurable time, date, days in week Alarm 2, configurable minute, hourly beep or time talk sunset, sunrise time for selected earth position and date moon phase