the upgrade of F121 compare with F121 Pro

F110S VS F121
Model	F110S	F121 Pro
Picture
Camera Protector for Image Transmission	The antenna of image transmission without protector may be cut by the propellers or easily broken off.	The newly designed cover with specially developed mould ensures the fixed position of camera and antenna funtion and avoids the possible damage caused by putting in and taking out of the pack.
Propellers Protector	Props protectors directly installed on the motors. The possible collision may make motor leaned or rip out motor wires.	The props protetors installed on the frame protect the props against collision and avoid the problems of bumping motors or ripping out wires caused by direct installation on motors.
	计时器信标接口	Soft material limits the protection effect.	The developed mould strengthen the props protectors and the square design prevents pilots from being hurt by propellers. The pattened dual notches make (un)installation easy.
	解锁方式	Propellers need to be uninstalled first each time to install the protectors, making propellers loose and steps annoying.	Dual notches installation reduces the tear and wear caused by repeatedly (un)installing propellers and ensures easy assemly.
Motor Crashproof	Two thirds of the motor is exposed, making it easily get bumped and affecst the flight. It requires manual adjustment of the motor position from time to time.	Two thirds of the motor is covered by the protector and ensures better persistence to possible collision and stable flight.
Battery Fixer	Battey fixed with rubber band and easily drops if bumped	The black plastic fixer at bottom ensures battery well
Battery Connector	JST connector, difficult to plug in and disconnect	PH2.0 connector, easy to plug in and disconnect
Battery Connector	电池固定	The battery wire to the flight controller would be easily broken after multiple pullings	The improved PCB design guarantees the battery wire weld to the flight controller and it won't be easily broken.

Micro Racing Drone Comparison

F121 VS F121 Pro
Model	F121	F121 Pro
Picture
Flight Mode	AltHold Mode(Low-Speed) AltHold Mode(High-Speed) Stabilize Mode	AltHold Mode Stabilize Mode Manual Mode
The angle of camera can be adjustable or not?	Can not	Adjustable, 15 degree or 0 degree.
Voltage Output Port for Timer	No	Yes, have one
Arm and Disarm	Arm by push the throttle joystick to the lower right corner Disarm by push the throttle joystick to the lower left corner	Arm or Disarm by press the Switch of CH7

F121 VS Toy Plane			F121	Toy Plane
Functions	F121	Toy Plane
Altitude Holding	F121 flight with accuracy altitude hold even through narrow space or no matter how close to the surface (less than 10 centimeters height)	cannot to flight fast and cannot keep Altitude Holding when close to the surface
PID Autotuned	rise and descend at high speed even with Altitude Hold Mode	keep stable reply on slowly speed
FHSS, 67 channels pseudo-random frequency sequence	better anti-interference ability to both the same frequency band and different frequency bands, worry-free for more than hundred pilots competion at the same competition terrain at the same time	can not more than three pilots competion at the same competition terrain at the same time
Professional Transmitter	2000 meters control distance, FPV racing freely at any flight environment	100 meters control distance
Noise Reduction by Software	not only enables the motors of F121 to work without noise during the flight but also makes them more responsive and efficient than traditional 8520 coreless motors, ensures a longer life span	too much noise when flight serious heating makes the motors with short life span
FPV Image Transmission System	The image transmission system that integrates camera and OSD module, ensuring voltage, flight time, power real-time feedback, stable transmission with more than 600 meters telemetry distance and good video photography.	can not FPV racing because of the delay of the image transmission module
FPV Image Transmission System	RadioLink professional transmitter for racing drone
	专业航模配置电池固定		Flight controller with altitude holding by inertial navigation designed for racing drone

			电池固定	Carbon fiber and plastics	全新PCB设计改进飞控上的电池线焊接，连接牢固不易扯断
						FULLYMAX battery, 10 minutes flight time
							GEMFAN Propeller
							EWRF Tech image transmission system that integrates camera and OSD
							Hawkeye FPV Monitor: 4.3 inch, 5.8GHz, and forty-eight channels FPV display with receiver integrate, with the resolution of 4803(RGB)272, the aspect ratio of 16:9 and response time of 10ms.