Parameters: <br />Bluetooth profiles: Hands free / Headset<br />Radio frequency: 2.402-2.480GHz<br />Transmission power: Class2<br />Support: A2DP music output (Audio Output: 35mW・ Play Pause)<br />Transmission range: 10 meters<br />Charging Power: AC Input 110-240V・ DC output<br />5V (charging time is about 2 hours / charging voltage of 3.7V)<br />Standby time: 120 hours<br />Operating Current: <15mA<br />Noise MIC: with top Silicon Mark<br />Wearing style: in-ear headphones stealth<br />Battery: 50mA rechargeable lithium battery<br /><br />Features: <br />1 can talk・ listen to music・ chat QQ・ micro letters・ watching movies ...<br />2. Press to answer / hang up / redial calls・ play / pause.<br />3. Built-in DSP digital audio processing system to ensure call clarity・ pure music.<br />4. Operation voice prompts to telegraph number・ the English voice can be selected via buttons.<br /><br />Application: all Bluetooth-enabled mobile phone・ tablet・ PC.<br /> <br />Packaging: <br />Headphones * 1・ <br />charging cable * 1 <br />