about this article 【Dual Pairing Mode & Dual EQ Design】: The neck-mounted earphones keep you connected with two source devices at the same time. The dual EQ settings on the Bluetooth headset can be easily switched according to your preference. Easily switch between music and calls on the headset, never miss a call. 【Flexible Structure & ic Earbuds】: The bluetooth wireless earphone necklace is made of TPU material, which is very lightweight, non-slip and skin-friendly. Flexible neckband structure, even if bent in a large arc, the earphones can return to their original shape 【Bluetooth 5.1 & Powerful HI-FI Base】: The neckband bluetooth headset is designed with advanced bluetooth 5.1 chipset, with 10mm copper speaker, ring-shaped CVC8.0 noise reduction technology, providing the most stable signal, high-fidelity sound quality, strong And strong bass, smooth and comfortable treble. 【Waterproof IPX5 & Lightweight Design】: The headphone wireless neckband is made of liquid silicone, which is light and soft and won’t make your neck uncomfortable. The ergonomic design makes the earbuds more suitable for small ears. With an IPX5 rating, these earbuds are built to withstand even the harshest outdoor conditions, giving you the confidence to take your headphones anywhere 【FAST CHARGING & LONG BATTERY LIFE】The bluetooth earphone necklace adopts a built-in polymer lithium high-capacity battery to provide long-lasting battery life, which can support up to 16+ hours of playback time on a single charge. Fast charging technology enables 10 minutes of charging to get 1 hour of play or talk time, and 2 hours of full charging to get 16 hours of play time.