SUPPORT TF CARD MODE - Bluetooth neckband headphones no need to connect Bluetooth can also enjoy thousands of music or e-books in the memory card, double-click the "C" button to switch (up to 64G TF card). Can effectively save mobile phone powernote: The Wireless Neckband Headset not include TF cardSUPER LONG BATTERY LIFE - This Wireless neck headphones, You can continuously play the headphones up to 100 hours after each full charge, And also the standby time is up to 360 days. Fully meet your needs for battery life, will provide you with protection for enjoying wonderful music from several days during travel or sports.USB C Fast ChargingEquipped with a USB type-C charging cable to speed up charging, charging for 5 minutes can last at least 2 hours of playback, charging for 2 hours, allowing you to continue to enjoy music for 100 hours. Note: Does not support USB C to USB C PD fast charging for chargingREDUC NOISE / WATERPROOF - This Bluetooth neckband headset has a CVC6.0 noise reduction microphone, which can reduce noise and enhance the sound clarity of calls and music. Wearing earphones to play light music or audio books while sleeping can block outside noise and help you sleep better. Its IPX5 waterproof let you to enjoy running, cycling, driving, fitness and other outdoor sports.