Product Description 1. SUPER LONG BATTERY LIFE: This Bluetooth headset has a 50mAh rechargeable battery, which overcomes the difficulty of running out of battery during business trip, driving, meeting or traveling. Supports 3-4 hours of talk time and only takes about 2 hours to be fully charged. 2. ADVANCED BLUETOOTH 4.1 CONNECTION: Bluetooth V4.1 and the latest CSR chip technology provide faster, more stable and wider compatibility with the most Bluetooth-enabled devices, including mobile phones, tablets and laptops. 3.SUPER CLEAR VOICE FOR HANDSFREE TALKING: This Bluetooth headset features a noise-cancelling microphone that can reduce noise and improve sound quality for phone calls and music. Ideal for business people, truck drivers and other hands-free people speaking in different environments. 4. MUTE MIC: This Bluetooth headset has a mute microphone function. When answering calls, it can mute the microphone by pressing the mute button once, offer you safe conversation and meet your different conversation needs. 5. RELIABLE TO WEAR: Thanks to the customer suggestion, this earphone is ergonomically designed. It allows the earphone to fit your ear snugly, the lightweight material provides secure wearing without pain, and the ears will not feel uncomfortable after long-term wearing. The adjustable earbud fits your left or right ear perfectly, bringing you a brand new wearing experience.