FreeMate DW-779U Tel/PC Wireless Headset 無線耳機 - 適用於電話及電腦DECT bandwidth allows over 40 headsets con current connection available Compatible for most business phone, PC and Softphone Automatic Pairing Process 2 Wearing styles as standard ear hook, surefit headband Noise Cancelling Microphone Up to 100 meter coverage Up to 8 hours talk time Standby time up to approximately 50 hours Certifications : RoHS, CE, FCC, KC Made in Korea, 2 year carry in warranty