Built-in answering button; the wireless distance between the earphone and the neck ring is approximately 20 cm. Compatible with Android phones, tablets, Kindle devices, e-readers, and any portable device equipped with a standard 3.5mm jack, including phones and MP3 players. Compact design, lightweight, easy to wear, delivers clear sound with long battery life. Ergonomic fit for comfortable and secure wearing; high-strength cord allows for easy removal from the ear canal. Constructed with high-quality materials for durable everyday use. Product model: DK06 Cable length: approximately 1.6m / 5.25ft Headphone jack: 3.5mm Design: anatomical shape Driver type: magnetic / analog Maximum output: 110dB Battery type: SR416SW / 337 Battery life: up to 8 hours Package includes: 1 x Headphone cable 1 x Earphone 2 x Replacement batteries Instructions: 1. Open the battery compartment, insert the battery correctly, and gently close the cover. Insert the earpiece into the ear canal while holding the handle; a faint sound indicates proper function. 2. Adjust the volume on your device to desired level. 3. Set your mobile phone to ring or vibrate mode as preferred. 4. Place the induction loop around your neck and connect it to your device (mobile phone, radio), positioning it under or within clothing. 5. When a message is transmitted via radio, the induction loop receives the signal and transfers it to the earpiece, which converts the electromagnetic signal into sound, enabling wireless listening. Communication range is proportional to radio signal strength. Voice communication is possible over existing network connections when using a mobile phone. Note: New and old versions of this product may be shipped at random. Please ensure acceptance of this condition before placing your order.