Refer to wiki and everymac instructions：

• iphone：https://everymac.com/systems/apple/iphone/index-iphone-specs.html
• Apple Watch：https://everymac.com/systems/apple/apple-watch/index-apple-watch-specs.html
• Models from wiki：https://theapplewiki.com/wiki/Models

Identify your Apple Device from Apple support：

• iPhone：https://support.apple.com/en-us/HT201296
• iPad：https://support.apple.com/en-us/HT201471
• MacBook Pro：https://support.apple.com/en-us/HT201300
• MacBook Air：https://support.apple.com/en-us/HT201862
• iMac：https://support.apple.com/en-us/HT201634
• Mac mini：https://support.apple.com/en-us/HT201894
• Mac Studio：https://support.apple.com/en-us/HT213073
• Apple Watch：https://support.apple.com/en-us/108056