Powerful performance and stable connection are supported by bluetooth-compatible 4.0 chip. Our product supports connection of two mobile phones at the same time for the matters of your private life and work. Our product supports vibration reminder of calls so that you will not miss any important call even in a noisy outdoor environment. Made of ABS and silicone material, it is durable and reliable. With clip design, it is easy and convenient to carry so you can clip the earphone on the collar. Our product adopts retractable design and it will work smoothly after frequent pulling. Our product supports wireless calls and adopts a novel design of separation of the fuselage, which can bring you much convenience. It can make you charming and unique no matter for a student or a business person. The length of the product is 5.5cm, the width is 2.7cm, the height is 1.5cm. Our product is compatible with most smart phones with Bluetooth. It supports one-key control so that you can answer/ring off call and adjust volume easily and conveniently. bluetooth-compatible 4.0 has a good performance which include super power saving, no radiation and so on. It is also a perfect choice for drivers and you can enjoy a more safe driving by using this earphone for calls. Item Name: bluetooth-compatible Earphones Material: Silicone,ABS Model: F960 Bluetooth Version: 4.0 Transmission Distance: 10m Battery: Built-in 80mAh Rechargeable Battery(Included) Charging Time: about 2 Hours Talking Time: more than 5 Hours Playing Time: 4 Hours or more Standby Time: more than 75 Hours Features: Easy to Operate, Clip Design, Vibration Reminder Size Details: 5.5cm x 2.7cm x 1.5cm/2.17" x 1.06" 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 bluetooth-compatible Earphone 1 x Big Ear Cap 1 x Small Ear Cap 1 x Data Cable 1 x User Manual