1、Built‑in lithium battery for super battery life, 500mAh large‑capacity battery, can be used for cyclic charging, support to play music while charging，durable more safe. 2、Turn on the radio function to listen to a piece of news, crosstalk, enjoy yourselves. 3、When the phone is answered via wireless, for DSP noise reduction function high definition microphone. 4、No need to pick up your phone, answer with one key, bringing high definition voice calling experience. 5、Small and interesting, no matter how you put it is a work of art. Item Type: Mini Bluetooth Speaker Material: ABS Color: As Pictures Shown Weight: Approx. 275g/9.7ozProduct Model: JY-WT Wireless Specification: Wireless V4.2 Transmission Distance: ≥10m/32.8ft (depending on Environmental Factors and Different Connected Wireless Devices) USB Charging Voltage: DC5V Built-in Battery: 500mAh Lithium Battery Output Power: 3W Frequency Response: 100Hz-18KHz Signal to Noise Ratio: ≥85dB 1 x Manual 1 x Charging Cable 1 x Speaker