The functions of SYMA X21 and SYMA X15 are mostly the same, including hover function, one key to take off or landing, headless mode, 360 degree flip over, double protection, LED navigation lights and so on. SYMA X21 and SYMA X15 are both suitable for beginner and children who are above 8 years old. However, they have some differences.
SYMA X21 upgrade on the basis of SYMA X20, mainly change the size, remote control and battery. SYMA X20 is a mini type drone, then SYMA X21 can be said to be a small size remote control aircraft. The size from 10.50 x 10.50 x 2.50 cm to 13.60 x 13.60 x 3.10cm, the multiple function keys of remote controller was changed into three keys, bringing more beautiful appearance and higher maneuverability. The battery capacity expanded to 3.7V/380mAh. Charging time 50 minutes unchanged, flight time is about 2 minutes, flight distance about 25m. SYMA X21’s control distant is about 25m.
Compared with X21, SYMA X15 whose size is 22.00 x 22.00 x 5.00cm is bigger. The battery capacity is 3.7 V/450mAh, charge time is less than 100mins, flying time is about 7mins and control distant is about 50m.
|SYMA X21||SYMA X15|
|Dismensions||13.60 x 13.60 x 3.10cm||22.00 x 22.00 x 5.00cm|
|Charging time||Less than 90mins||Less than 100mins|
|Flying time||More than 5mins||More than 7mins|
|Control distance||About 25m||About 50m|