{"url":"https://secondhandmacbook.com/m/air/m4/","facets":["air","m4"],"label":"MacBook Air, M4","definitions":{"air":"line = MacBook Air","m4":"chip_family = M4"},"count":2,"source":"manufacturer spec pages; null = not stated by the maker","listings":"coming soon","models":[{"model_id":"macbook-air-13-inch-m4-2025","model":"MacBook Air (13-inch, M4, 2025)","year":2025,"size_in":13.6,"chip":"M4","memory_max":"Up to 32GB","storage_gb_max":2048,"thunderbolt":"4","external_displays_max":2,"battery_wh":53.8,"source_urls":["https://support.apple.com/en-us/122209"],"url":"/models/macbook-air-13-inch-m4-2025/"},{"model_id":"macbook-air-15-inch-m4-2025","model":"MacBook Air (15-inch, M4, 2025)","year":2025,"size_in":15.3,"chip":"M4","memory_max":"Up to 32GB","storage_gb_max":2048,"thunderbolt":"4","external_displays_max":2,"battery_wh":66.5,"source_urls":["https://support.apple.com/en-us/122210"],"url":"/models/macbook-air-15-inch-m4-2025/"}]}