DESCRIPTION: Interactive Music, Moon Phase Screen Size :44-49Mm Model Number:T900 Ultra Battery Type:Polymer Lithium Battery Screen Size::2.02-inch IPS screen Display Type :Computer LCD Monitors Screen Resolution : 240*286 Features :Touch Screen, APP Control, Sand Playbox Operating System : Android, Android Watch Camera :No Camera Design :Sandal Movement Type :Electronic Tape Material :Rubber Cover Material :Alloy Standby time:15 Days. Usage time:3-5 Days. Charging method: Wireless charging. Charging voitage：DC-5V. Watch material：Zinc alloy shell. Product size：44*38*13 Function :Lighting, Calendar, Alarm Clock, Week, Month, World Time, Sleep Tracker, Fitness Tracker, Both Small, Calculator, Phone Reminder, Call Answer,