It is comfortable to wear this headphone for a long time because it has adjustable head beam and the soft cushions. This headphone adopts Bluetooth-compatible5.0 chip and intelligent noise-reduction technology, supporting stereo surround sound effect and mega bass. It is constructed of ABS material. The length of this wireless headphone is 16cm, width is 8cm and thickness is 4cm. This wireless headphone is suitable for doing sports, fitness, running, hiking, walking and so on. It is card play and FM radio, which is multifunctional. Item Name: Wireless Headphone Material: ABS Audio Input: 3.5mm Jack Speaker Sensitivity: 105+-3dB Speaker Withstand Power: 25mW Speaker Frequency Range: 20Hz-20KHz Impedance: 24ohm Microphone: Support Microphone Frequency Range: 30Hz-16KHz Microphone Sensitivity: -58+-3dB Bluetooth-compatible Version: V5.0 Transmission Protocol: EDR+A2DP Transfer-Encoding: SBC Noise Reduction Technology: DSP+AEC Frequency Range: 2.402-2.480GHz Effective Transmission Distance: 10m Transmit Power: 5dBm Battery Capacity: 150mAh(Included) Charging Current: 5V 500mA Charging Time: Less Than 1H Usage Time: Larger Than 5H Standby Time: Larger Than 1000H TF Card: Support Up to 32G Features: Sensitive, Comfortable, Stable Transmission Size Details: 16cm x 8cm x 4cm/6.3" x 3.15" x 1.57" (Approx.) Notes: 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. Package Includes: 1 x Wireless Headphone 1 x USB Cable