The pencil you ordered support ipad models newer than 2018. Does not support the old ipad models before 2018. 【Not compatible with models before 2018】The stylus doesn't support iPad pro 1st&2nd, iPad pro 10.5", iPad pro 9.7", iPad 1 to 5 Gen, iPad mini 1 to 4 Gen, iPad Air 1st/2nd Gen versions of iPad.
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