This is my meter.
View attachment 1556632
I put the buds still on stems in brown bags when it read 12%-13% and then into 1/4 Lb. Grove Bags at 11%. I add a hygrometer and zip closed for a few hours or overnight. If the hygrometer is in the 58% to 63% range I take the hygrometer out and heat seal the bag. Cure at least 2 weeks.
I have some over a year old and never opened until I need some. Works a treat.