This product shows the technical specifications of your speaker, model Clikon CK818. Here are the details of these specifications and how to benefit from them: Power Input (DC input): Operates at 5 volts and 20 watts, meaning you can charge it using a regular smartphone charger or a suitable USB port. Battery: Capacity of 1500 mAh at 3.7 volts, it's a rechargeable battery that gives you portable wireless operation. Frequency Response: Ranges between 100 Hz to 20 kHz, covering most audio frequencies to provide clear and balanced sound between sharp and mid tones. The product is in excellent condition.