Specifications:Bluetooth 4.2 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-compatible SpeakerMaterial: ABS, Aluminum AlloyBluetooth: V4.2TF 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-compatible Speaker1 x USB Cable