Features: This is a small and portable mixer. If your devices have one microphones or instrument interfaces, this device can increase the number of expansion interfaces to achieve the purpose of multichannel input. It have 8-channel input and 1channel output, and the volumes of each channel can be adjusted independently. Input and output: 6.35mm 1/4in mono interfaces. Charging: TYPE C interfaces, DC5V, and it can be charging with mobile phone charging adapters. Battery capacity: 500mAh. It can be used continuously for more than 10hours after a single charge. Gains0dB/10dB, switched by push-button . Indicator light status: Flashing 4 times continuously indicates that the battery have 4 bar of power, flashing 3 times indicates 3bar of power, and so on. The light stays on when the battery is fully charging . This device also have another feature: it is equipped with a builts-in isolated power supply, which ensures there is no interferences when it is used while being charging. It can be connecting to charging adapters or other USB interfaces for power supply, and it can be used with continuous power supply for long time. Specifications: Component:Metal Size:Approx.205x75x24mm/8.07x2.95x0.94inch Input and Output:6.35mm 1/4in mono interfaces Charging: TYPE C interfaces, DC5V, and it can be charging with mobile phone charging adapters Battery capacity: 500mAh Gains0dB/10dB,( switched by a push-button ) Package Includes: 1pc Audios Mixer 1pc 6.5mm Audios Cable 1pc Charging Case note: Please allow 1-10mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.