DetailsThis streamlined sport wireless earphones let you listen to your favorite music during exercise and travel whether you�re dancing in room or on the subway. You�re free to connect to one device or two devices simultaneously within 32 feet. Its built-in microphone provides you the ability to talk hands-free and the in-line remote allows you play/pause music, adjust volume, switch tracks, redial the last number and more. Clear crisp sound Dual device wireless connection Auto voice prompts including phone number reports Built-in mic for hands-free talking Noise reduction and echo cancellationVolume +/-, prev/next, play/pause, answer/hang-up/reject and more One-button the last number redialing Allows remote devices camera control Battery display on iOS devicesIncludes a variety of carcap options for personal fit and comfort Comes with carrying caseWireless version - V4.1 Input - DC 5V 200mABattery - 70mAh rechargeable battery Frequency - 20Hz-20KHzImpedance - 16OTransmission distance