[. . . ] Other product and company names ENGLISH Unauthorized changes or modifications to this device may void the user's authority to operate the equipment. Export Controls This device may contain commodities, technology or software subject to export laws and regulations from the US and other countries. [. . . ] If charging does not start, disconnect the charger, plug it in again, and retry. The fully charged battery has power for up to 7 hours of talk-time or up to 220 hours of standby time. However, the talk and standby times may vary when used with different mobile phones or other compatible Bluetooth devices, usage settings, usage styles, and environments. When battery power is low, the indicator light flashes fast. Switch the headset on or off To switch on, press and hold the multifunction key until the indicator light turns on and the headset beeps. To switch off, press and hold the multifunction key until the indicator light rapidly flashes four times and then turns off. Pair the headset 1. When the headset is off, press and hold the multifunction key until the indicator light is continuously displayed. Activate the Bluetooth feature on the phone, and set the phone to search for Bluetooth devices. Enter the passcode 0000 to pair and connect the headset to your phone. In some phones you may need to make the connection separately after pairing. If the pairing is successful, the indicator light starts to flash slowly, and the headset appears in the phone menu where you can view the currently paired Bluetooth devices. The headset is now ready for use. Basic use Wear the headset Slide the earloop behind your ear (8), and push or pull the earloop to set its length. To use the headset on the left ear, gently flip (9) and rotate the earloop (10). Call handling To make a call, use your phone in the normal way when the headset is connected to your phone. [. . . ] Precipitation, humidity, and all types of liquids or moisture can contain minerals that will corrode electronic circuits. High temperatures can shorten the life of electronic devices, damage batteries, and warp or melt certain plastics. [. . . ]