Specifications:Bluetooth 5.1 wireless technology can ensure high-quality strong signal transmission and provide high-fidelity stereo music.The product has high-quality speakers and vibration diaphragms,which can provide clean and excellent sound quality.Built-in high-capacity 450mAh rechargeable battery,which can provide about 4 hours of working time.This portable bluetooth speaker is lightweight and compact,allowing you to carry it with you,and suitable for more occasions.Item Name: Bluetooth SpeakerMaterial: ABS,Aluminum AlloyBluetooth: V5.1TF Card: SupportSpeaker Output: 5WDistortion: 5 PercentSignal And Noise: 95DBBluetooth Communication Protocol: A2DP,AVRCP,HFP,HSPBattery: Built-in Battery/450mAh (Included)Charging Voltage: DC 5VCharging Time: About 3 HoursTalk Time: About 5 HoursPlay Time: About 5 HoursFeatures: Portable,Convenient,Pocket-sized,Stereo Bass PlayerSize: 9.1cm x 4.8cm x 2cm/3.58 x 1.89 x 0.79 (Approx.)Notes: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 Bluetooth Speaker1 x USB Cable