Bird Magnetic Sexer-Check Pigeon/Bird Female and Male Tool

Specifications:

Name:pigeon and bird sexer(tell bird and pigeon male or female)

Model:G-502
Packaging:200pc/ctn 
N.W:8kg 

G.W:10KG 

Application : pigeon and bird 

Usage: test pigeon and bird gender 

Power: no need charger 

Using method: 

put is on the wing of the bird, 

move it gently for 5 second then stop to move ,you will see it move by itself . 

wait It rotates with uniform , 

if it moves in straight line it means the bird is male. 

if it moves in circle it meas the bird is female