To provide you with clear and high-definition call sound, our product uses an omnidirectional microphone and CVC8.0 dual noise reduction technology. It supports multi-point connection, that is, it supports dual phone connection. You will never miss any calls because of the voice prompt function. It is made of ABS, metal and electronic components. These materials are durable and reliable to use. The length of the product is 8.5 cm, the width is 8 cm, and the height is 1.5 cm. It is perfect for your car and has high performance in use. This speakerphone supports automatic power on/off. Item Name: Car Speakerphone Material: Metal, ABS, Electronic Component Bluetooth Version: 5.0+EDR Bluetooth Transmission Distance: 10m Speaker: 4¦¸ 2W Noise: 20 decibels With Microphone: Yes (Omnidirectional Microphone) Battery: Built-in 600mAh Rechargeable Battery (Included) Features: Rechargeable, Multi-point Connection, Hands-free Size Details: 8.5cm x 8cm x 1.5cm/3.35" x 3.15" x 0.59" (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. Package Includes: 1 x Car Speakerphone 1 x USB Charging Cable 1 x Car Charger 1 x User Manual