Specifications: Using advanced bluetooth-compatible 5.0 technology, it can provide a more stable connection(the maximum connection distance is 15 meters), faster pairing and universal compatibility. It is not only a wireless headset, but also a sporty MP3 music player, you can enjoy your own music without having to carry your phone. It can expand TF card, the maximum support 32GB, but does not include TF card. With the additional FM radio function, you can enjoy the fun of A23 multifunctional wireless headset. With just 2 hours of charging, you can have up to 10 hours of talk time and audio playback time, which is enough to provide you with a week of music support. The wireless bluetooth-compatible headset is designed for sensitive ears and is also suitable for most ears. This headset can balance the pressure on the ears to achieve a long-lasting and comfortable wearing effect. Item Name: Wireless Headset Material: Plastic Bluetooth Version: bluetooth-compatible V5.0 Battery Capacity: 450mAh(Included) Charging Time: 1-2 Hours Standby Time: 300 Hours Playing Time: 10 Hours Features: Neck-Mounted Headset, bluetooth-compatible V5.0, Music Player, FM Radio, Long-Lasting Performance, Comfortable to Use Size: 11cm x 7cm x 3cm/4.33" x 2.76" x 1.18" (Approx.) Notes: TF card is not included. Due to the light and screen setting difference, the item& 39;s color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Wireless Headset 1 x User Manual 1 x USB Charging Cable Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.