Specifications: Mini and lightweight, easy to carry around. Built-in rechargeable battery, low power consumption. Directly connect to your mobile phone, laptop or other audio devices, and enjoy the stereo music. Item Name: Music Speaker Case Material: ABS Battery Capacity: 3.7V/300mAh (Included) Charging Voltage: DC 5V/500mA Output Power: 3W Output Impedance: 4Ohm Frequency Response: 50-18000Hz SNR: ≥80dB Speaker Size: 1.4inch Connection Type: 3.5mm Audio Jack Features: Rechargeable, Mini, Portable, Sound Amplifier Diameter: 4.6cm/1.81" (Approx.) Height: 3.3cm/1.30" (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 Music Speaker 1 x Charging Cable