This Speakerphone is powered by a micro-USB cable. You can use with the car cigarette lighter adapter to charge in the car, or use a wall adapter to use as a conference speakerphone at home or in the office. The advanced built-in microphone uses DSP technology for echo cancellation and noise reduction. This Bluetooth In-Car Speakerphone brings you an outstanding full duplex sound quality.

Specifications
Color: Black
Product Weight: 70g
Package Weight: 115g
Product size (L x W x H): 14.50 x 7.00 x 4.50 cm / 5.3 x2.5 x 1.5 inches
Bluetooth : Standard Bluetooth Version 4.1+EDR
Bluetooth Frequency : ISM 2.4 GHz Bluetooth Operational Range 0-10 meters
Build-in Rechargeable Battery : 3.7V 500mAh
Hands-free Battery Run Time : 18-20 hours
Stand-by Battery Run Time : 300 hours
  
Features
[Extremely easy to use] Just pair to your phone and place this Bluetooth in-car speaker on your sun visor. It can be paired with two devices simultaneously and features noise cancellation technology for clear calls in the car.
[Built-in motion sensor] Start driving without delay as this Bluetooth hands-free car kit switches to Auto Power and connects with your phone when car door is opened.
[Delicate design] Cool shape and portable with stability feature just hang it to the sun visor without taking space equipment comes with USB cable and car charger support 7 language simultaneously press"+" "-"
[2W Powerful Speaker] Great Volume and Clear Sound Powerful 2 Watt Speaker and high sensitivity microphone deliver high-quality audio for voice and music.
[Note] Please charge it no less than 5 hours when you first use it, means to activate the battery.