K1 V4 directly from Keychron. seems like the older version has a bigger battery 4k vs 2k. mine lasts about 2.5 days before the battery needs a recharge. (i dont turn off my keyboard, its on standby at night when i'm sleeping.
USD but on my CC it showed GBR 104.10 USD
No duties although there were some people that said they got dinged. sooo be ready.