Holy Stone HS210 Mini Drone for Kids RC Nano Quadcopter with 3 Batteries

3 Batteries Extend Flight Time — Flight time is up to 21 Minutes. Never be disappointed by a died battery or waiting for charging!
User-friendly — The Altitude Hold function enables itself to hover at fixed height stably; under Headless Mode, directions is always relative to where pilots face; offering care-free fly for kids, beginners, newbies, etc.
Much Fun — The drone can perform 3D flips; kids love it! The speed can be changed to fit pilots’ flight proficiency. And the low battery power alarm spare of concerns of any loss or damage due to low power.