Mpow Bluetooth Headset V4.2, Wireless Earpiece with Noise Cancelling Dual Mic, Bluetooth Earphone for Cell Phone, 8 Hours Playtime DUAL-MIC NOISE CANCELING TECHNOLOGY: Mpow EM9 Bluetooth earpiece has dual noise-cancelling microphones, cancelling disruptive background noise and wind noise effectively for clearer phone calls and music. A must-have for driving, office, business and home use. BLUETOOTH 4.2 + CSR CHIP TECHNOLOGY: Bluetooth V4.2 & CSR chip provide quicker, more stable and broader compatibility with most Bluetooth enabled devices, including smartphones, tablets, laptops, etc. DUAL WIRELESS CONNECTION: It can also pair with two devices at the same time. WEAR IN MAX COMFORT: Three sizes of flexible silicone eartips (S, M, L) with 2 ear hooks provide a comfortable and stable fit. Note: Please try all eartips and choose the most suitable one. LONG LASTING PLAYING TIME: Mpow EM9 Bluetooth headset has a built-in 75mAh lithium-ion polymer battery. It offers enjoyment of 8 hours music or phone conversation with a charging of only 1.5 hours. CONVENIENT BUTTON DESIGN: This wireless earpiece has 1 handy power button, 1 multifunction button and 2 volume control buttons. You can easily turn on/off, receive phone calls and adjust music when wearing it. (Note: You can also adjust your phone's volume if the earpieces sound isn't loud enough for you!)