Description: With built-in large-capacity rechargeable battery, it has long battery life. And it adopts Bluetooth-compatible 5.1 version design, which has low power consumption and stable transmission. The built-in high-clarity and noise reduction microphone enables the audio adapter can support Bluetooth-compatible handsfree calling function. It is made of high-quality ABS and electronic components material. The length of the product is 58mm, the width is 30mm and the height is 11.5mm. The adapter is suitable for car, home, office and so on. Item Name: Bluetooth-compatible Adapter Material: ABS, Electronic Components Bluetooth-compatible: 5.1 Distance: 10m Battery Capacity: 240mAh (Included) Working Time: About 9 Hours Features: Voice Broadcast, Automatic Connection, Long Battery Life Size Details: 5.8cm x 3cm x 1.15cm/2.28" x 1.18" x 0.45" (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 Bluetooth-compatible Adapter 1 x Audio Cable 1 x USB Charging Cable 1 x User Manual 1 x Metal Plug