Features 1.ONE BUTTON OPERATION: Multi functional cell phone handset, press the one key answer button to answer or hang up a call. 2.ADJUSTABLE VOLUME: Support handset volume control, slide to adjust the listening volume to meet the needs of the scene. 3.5MM PLUG: The wired cell phone handset features a 3.5mm sound plug, compatible with different brands of smartphones. 4.FLEXIBLE USE: This wired mobile phone handset is designed with a 9ft coiled cord for added flexibility in the range of use. 5.RADIATION PROOF: Retro style cell phone receiver reduces cell phone radiation with excellent sound quality, also suitable for computers. specificationItem Type: Cell Phone Handset_x005F_x000D_ Material: ABS_x005F_x000D_ Compatibility: Works with all smartphones and computers with a 3.5mm headphone jack_x005F_x000D_ Function: Supports Hang Up and Answer PackageList1 x_x005F_x000D_ _x005F_x000D_ CellPhoneHandset