Features: Built-in large-capacity 3000mAh battery, long standby for time for listening to music and playing games. Support type-C fast charging; Built-in magnets clasp the earpieces together for easy carrying and wearing. Bluetooth-compatible headphone provide faster pairing, more stable connectivity with your bluetooth-compatible enable phones, tablets, laptops, TV etc. Support TF Card for play back; Specifications: Material:ABS Battery Capacity:3000mAh Color:Black,Green; Bluetooth-compatible Version: V 5.3 Operating range: up to 33 feet (10 meters accessibility) Option Type:Black Bluetooth-compatible Neckband Headphone;Black Bluetooth-compatible Neckband Headphone with 128G Memory Card;Green Bluetooth-compatible Neckband Headphone;Green Bluetooth-compatible Neckband Headphone with 128G Memory Card; Note: Please allow 1-2cm errors due to manual measurement,pls make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Bluetooth-compatible Neckband Headphone