With special telescopic and collar clip design, the product is more convenient for you to use. The product has multiple advantages, such as voice prompt, vibration alert, and connecting two phones at the same. Made of the premium ABS material, the product is durable, lightweight and portable. The length of the product is 6.8cm, the width is 2.5cm, and the height is 2.2cm. It is a bluetooth-compatible earphone for business, sports, driving or other situations. Item Name: bluetooth-compatible Earphone Material:ABS Charging Time: 2h Operating Voltage: 3.7V Charging Voltage: DC 5V Battery Specification: 80mAh Working Frequency: Class2 Bluetooth Version: V4.0 Bluetooth Transmission Distance: 10m Talk Time: 6h Standby Time: 80h(Included) Chip Model: CSR Listening Time: 5h Size Details: Length: 6.8cm/2.68" (Approx.) Width: 2.5cm/0.98" (Approx.) Height: 2.2cm/0.87" (Approx.) Notes: Due to the light and screen setting difference, the color of item may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 X User Manual 1 X Charge Cable 1 X bluetooth-compatible Earphone