Packing list: 
<br />1 x Bluetooth Headset Cable (with battery) 
<br />1 x USB Charging Cable 
<br />
<br />Specification:
<br />Color: Black
<br />Appearance Material: Plastic
<br />Bluetooth version: 4.1
<br />Bluetooth distance: 10 meters (open area)
<br />Battery capacity: 120mAH lithium battery (built-in)
<br />Duration: 8 - 10 hours (full charge)
<br />Charging interface: USB 2.0
<br />Charging voltage: DC 5V
<br />Product Interface: Mirco USB
<br />Applicable Products: For Shure SE215, SE535, MMCX
<br />Product features: Answer / Hang up the phone, Volume adjustment, Switch, Music player / pause, Boot and connect to voice prompts, Maximum / minimum volume voice prompts, Telephone redial, Bluetooth re-connect, low-power voice prompts.
<br />Line length: about 80cm