With silicone ear caps, this earphone is suitable for talking on the phone for a long time and you will not feel uncomfortable. A high-definition call just like face to face can be provided by this product because of its intelligent noise reduction technology. Made of ABS and silicone material, it is durable and reliable. When a call comes in, the earphone motor will vibrate for reminding so that you will never miss any important calls. With clip design, it is easy and convenient to carry so you can clip the earphone on the collar. Our product adopts anti-lost vibration design and the earphone will vibrate to remind you when the phone is 10 meters out of connection scope. 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 connection of two mobile phones at the same time for private life and work. It adopts retractable design so that it supports one-key to retract the headphone cord without tangling. You can enjoy 5-hour continuous talk comfortably without heating of the headset. Item Name: bluetooth-compatible Earphones Material: Silicone,ABS Model: F910 Bluetooth Version: 4.0 Transmission Distance: 10m Battery: Built-in 80mAh Rechargeable Battery(Included) Charging Time: 1-2 Hours Talking Time: Up to 5 Hours Playing Time: Up to 4 Hours Standby Time: Up to 80 Hours Compatible Devices: Most Smart Phones with Bluetooth Features: Mini, Vibration Reminder, bluetooth-compatible 4.0 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