Full voice broadcast,Automatic switch function, save effort and worry,voice control550mAh battery, 500 hours long standby time,Continuous talk time about 10 hoursBuilt-in digital amplifier greatly enhances volume and sound effects,Advanced multi-point connection, support two mobile phones online at the same timeBuilt-in DSP noise suppression and echo cancellation (CVC8.0 dual noise reduction technology)Please check as much as possible to make sure the item is what you need.Bluetooth chip Version: V5.4+EDR• Support connecting two mobiles at the same time,Support A2DP function.• Built-in rechargeable lithium-ion battery 550mHA, standby about 500 hours.• Holding time About 10 hours• Support automatic connection• Support private answer• Support coming call number readout• Build-in DSP noise suppression and echo cancellation function• Loudspeaker:4Ω2W compatible Handsfree Car Kit Sun VisorNote: The Bluetooth version will be updated over time, please do not place an order if you mind.Color: As ShownMaterial: plasticPackage Contents:1*Car Bluetooth SystemOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.