Bluetooth Sun Visor Speakerphone, YOKKAO Bluetooth 4.0 Multipoint A2DP In-Car Hands-Free Car Kit with Clip for Smartphone Devices (White) BLUETOOTH 4.0 TECHNOLOGY - With new bluetooth version 4.0, support connecting two mobiles at the same time (choosable). max keep a record 8 mobiles. Bluetooth connecting within 10 meters. PERFECT DESIGN - This In-Car Bluetooth Speakerphone is mini and portable. Built with a sleek compact design that has a clip included to ensure the easiest placement anywhere in your vehicle. With an 650mAh built-in polymer battery and a micro USB port, charging is now effortless. Build-in DSP for noise reduction and echo cancellation; Quick clip-on as sun visor. HAND-FREE SPEAKERPHONE - With Hi-Fi 2W loudspeaker and high sensitivity microphone.It supports hands free calling to make sure safe driving. You can use it with the function of Voice Control, Voice Dialing (if phone supports), Last call redial, reject incoming call. MULTI-FUNCTIONAL - This speakerphone not only supports the function of answering or ending calls, redialing previous number, third party calling, adjustable volume. It also can Transmit mobile music pod casts and directions form a GPS App. Besides, it has personal connectivity function, allows for perfect sounding calls Features. TIPS - Long press button "+" or "-" can adjust volume. Short press button "+" or "-" can change song. Pressing + and - button at the same time can change language.