8‘mini chainsaw- How to oil the chain？

Mini Chainsaw Cordless 8 inch With Oiler, Tool-Free Chain Adjustment, 20V MAX* Rechargeable Cordless Chainsaw with Battery and Charger，Mini Chainsaw 8 inch Cordless Hand-Held Electric Chain Saw

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How many times do I need to squeeze the clear bulb? Do I need to squeeze it until I see oil within the bulb? Thank you.