... Frequency Compatibility "850MHz, 900MHz, 1800MHz, 1900MHz FM Radio bluetooth Watch Phone Specifications & Details Color silver shell and bracelet;black, ... bluetooth Battery:450 mAh, Talk Time: 3-4 hours -Stand By: 85-100 hours " GSM Frequency Compatibility "850MHz, 900MHz ... Chinese classic, Chinese simplified, English, and Thai Digital Watch: support 5 analog clocks and digital clock standby display ...