HighlightsWireless V4.1 Neckband EarphonesDetails*Features* - *LED Night Light* - The neckband will be illuminated at night and offer three modes(fast flash,slow flash and constant light modes) to choose via the light On/Off button,which ensure safety when sport at night.Crystal Clear Sound Effect - Adopts advanced CSR4.1+EDR technology to ensure transmitting strong signal and offer high-quality sound effect. Besides,echo cancellation technology ensures high definition sound reproduction.Ergonomic and Skin-Friendly Design - The two ear hooks adopts skin-friendly soft silicone materials and has ergonomic shape with frosted surface coated to ensure secure and comfortable wearing experience. Also the sweatproof materials keeps the earphone more durable.Ideal for Running - Its lightweight and sweat-proof design make it ideal for running,biking,hiking,yoga,exercises,travelling,etc.Ultra-Long Music Playtime - Embedded 120mAH lithium-ion battery can last up to 6-hour music playtime and 8-hour