2.4Ghz spread spectrum technology allows up to 12 helicopter flight together <br> 3.5 Channels with Gyro Stabilizer: Forward/Backward, Left/Right, Up/Down movements <br> Multi-Protection, Low-voltage and reverse connect protection and Jammed function to make longer lifespan. <br> Alloy Sturdy Material, Anti-collision, best choice for Kids and Beginners <br> with Many Certificates--FCC, CE, ROHS, EN71, EN62115, EN60825, R&TTE, PAHS, HR4040, 6P,ASTM,REACH. Compatible with US standard. It is very safety for kids playing. <br><br> Tips； <br> The Helicopter is suitable for indoor to get the best flight experience. <br> Do not to put the battery wrong direction. <br>