Specifications:This portable mini shape Bluetooth Speakerphone is specially designed for the aims of convenience and freedom of wireless communication. With the double'functional power adapter and advanced built'in microphone, it abopts D . S. P solution for echo cancellation & noise suppression, this speakerphone brings you an outstanding full duplex sound quality. It’s the best companion of the car owners and travelers. it is also the best companion of the car owners and travelers. You will love it! Buy it today! You can’t miss it!:This device use English voice repore.Conveniently kit to clipped to the car's sun visor, easy operation.Also used for hands-free calling at home, office, etc .Multipoint technology and this speaker can be connected to 2 mobile phone.Strong signal, clear sound and non-radiative.With the highest quality design: Adopt the steel wire clip to firmly fix this product on the sun visor.With the USB charging port: Adopt the Mini USB charging port.With the humanize button configuration: The most frequent use answer and hang button are.Located on the head of this product, so as to convenient to use. The button with the protruding design, you an easily find them and use it when during driving.With 2W speaker and high sensitivity microphone.How to use it:1. After switch on, press the button on the top of the product for six seconds, the indicator lamp will alternately flash with blue and red and has the voice prompt "Had readied to match".2. Open the phone Bluetooth function, and search for "BTLD-158" and click it to contact.3. After finish contacting, the phone will voice prompt "The phone one contacted".Type: Bluetooth Sun VisorMain Color: BlackCompatible Bluetooth Specification: V3.0+EDRWorking Frequency Range: ISM (2.4-2.48GHZ)RF Output Power: 0-10 MetersBulid-in Rechargeable Battery: 3.7V, 600-650mah (BL-5B)Working Time: up to 10-12 hoursStandby Time: up to 500 hoursThe Charger Output: 5V-6V 400MAThe Headset Power: 0.37WTransmitted Power: Class 2The Microphone Sensitivity: -41DBThe Noise: 20 Decibel Doise ReductionCharge Time: About 2-3 hoursThe USB Cable Length: 50cm/19.69" (Approx.)Size(L x W x H): 118mm x 46mm x 16mm/4.65" x 1.81" x 0.63" (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.