Martian Passport Smartwatches with Amazon Alexa &ndash; Analog + Voice (B00FI16HS0) Use Voice Commands - Create calendar events, check weather & directions, set an alarm and search the web hands-free. View Notifications - Get SMS, calendar, email and social notifications anywhere, anytime. Voice Text Messages - Send and receive hands-free voice-to-text messages while on the move. Take Phone Calls - Answer or place a quick call from your wrist, even when your hands are full. Martian Electronic Leash, Remote Camera Control and more. Compatible with iOS 9.0 and Android 5.0 and above. Up to 2 Year analog battery use. Up to 5 days of smart features use time