6Remote control functions may vary depending on the model of yourdevice and application. Sound track instructions do not respond to iOSdevices. Since devices with Bluetooth wireless technology communicateusing radio waves, they do not need to be in direct line-of-sight.Bluetooth devices must, however, be within 10 meters (33 feet) of eachother, although the connection may be subject to interference fromobstructions such as walls or from other electronic devices.Product and safety informationImportant: Read these simple guidelines. Not following them maybe dangerous or against local laws and regulations. For further info,read the complete user guide.For your safetySwitch off in restricted areasSwitch the device off when a Bluetooth headset use is not allowedor when it may cause interference or danger, for example, inaircraft, in hospitals or near medical equipment, fuel, chemicals,or blasting areas. Obey all instructions in restricted areas.InterferenceAll wireless devices may be susceptible to interference, whichcould affect performance.Batteries, chargers, and other accessoriesUse only batteries, chargers, and other accessories approved byHMD Global Oy for use with this device. Do not connectincompatible products.Protect your hearingTo prevent possible hearing damage, do not listen at high volumelevels for long periods.- Frequency Band: 2402 MHz - 2480 MHz- Maximum Radio Frequency Power: -6~+4dBm