1.Eyepiece bayonet: Internal diameter is between 38.5mm-43mm
2.Rubber sucker: Connected with mobile device
3.Lock catch: Rotate clockwise to narrow eyepiece bayonet, or anticlockwise to expand eyepiece bayonet, push up to fix eyepiece bayonet
4.Fine adjustment screw: Loosen to adjust eyepiece bayonet
(1) Preferentially take photos with touch screen camera if your mobile device has this function.
(2) Preferentially take photos with center focus if your mobile device has focus camera.
(3) Keep it away from fire and heat.
(4) If rubber sucker is stained with dust, rinse it for reuse.
(5) Do not scratch rubber sucker with sharp objects, or its service life will be affected.