With silicone earplugs, 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 due to its intelligent noise reduction technology. Made of ABS and silicone material, it is durable and reliable. When a call comes in, the earphone motor vibrates to remind you so that you never miss any important calls. With clip design, it is easy and convenient to wear so that you can attach the earphone to your collar. Our product has an anti-lost vibration design, and the earphone vibrates to remind you when the phone is 10 meters out of the connection range. The length of the product is 5.5 cm, the width is 2.7 cm, the height is 1.5 cm. Our product is compatible with most smart phones with Bluetooth. It supports connecting two mobile phones at the same time for privacy and work. It has a retractable design so that it supports a button to retract the earphone cord without tangling. You can enjoy 5 hours of continuous talk time comfortably without the headset heating up. Item Name: Bluetooth Compatible Headphones Material: Silicone, ABS Model: F910 Bluetooth Version: 4.0 Transmission Distance: 10m Battery: Built-in 80mAh rechargeable battery (included) Charging Time: 1-2 hours Talk Time: Up to 5 hours Play Time: Up to 4 hours Standby Time: Up to 80 hours Compatible Devices: Most Bluetooth-enabled smartphones 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 Headphones 1 x Large Earbud 1 x Small earplug 1 x Data cable 1 x User manual