Metal Magnetic: When not listening to music, two tones can be automatically combined to avoid entanglement and slippage. Real-time monitoring of the power of the electric display headset: When the power is exhausted, it is in time, and the power is clear at a glance. Veneer material: flexible, skin-friendly, elastic, fit the neck. Long usage time: The -capacity battery supports fast charging. Comfortable: It fits the contour of the ear better, wears firmly, and is not easy to fall off. Product Name: Bluetooth Compatible Headphones Version: 5.0 Distance: 10~15m Battery capacity: 1000mAh Continuous play time: 100H Frequency: 2.4-2.480GHZ Working voltage: 3.4-4.2V Charging time: 2H Charging input: 5V-500mAh Colour:black Material:Silicone+ABS Package Contents: 1 x Headphone (not including the memory card in the picture) 1 x charging cable Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.