Kudolo Smart Watch for Kids GPS Tracker for Kids SOS Call, GPS LBS Double Location, Monitor Wearable Smart Locator for Android Iphone (Yellow) Monitor kids position with GPS+LBS locating technology, real-time tracking, two-way communication and many more features that make parents keep track of their kids easily and efficiently One-Touch SOS Alarm: Hold SOS button for five seconds, an emergency call will dial out and SOS SMS (text) will be sent out for emergency help Compatible with android and IOS systems, support micro SIM card (SIM and nano-SIM Card is not included) ABS safe silicone rubber, environmentally friendly material with 90% lower radiation than smart-phones Re-chargeable 300mAh lithium-Ion battery, lasts approximately 60 hours on stand-by