| Can be used with any cell phones with a 2.5 mm ear-jack plug. Super light-weight with appropriate size. 2~3 hour duration for phone conversation Maximum stand-by duration up to 70 hours. Can be put-on in both ears Base is able to be installed in cell phone by using magnets. Maximum Operation Range : 10M Communication Technology - Bluetooth Specification V1.1 Transfer Method - Frequency Hopping Method Frezuency Used - 2.4GHz ISM Band Communication Method - Selection of TDD method with dual carriage while communicating Battery : 3.7V Lithium ion Charger : 12V, 300~500mA AC Adapter : 220V, 3.6W | 
