The portable mixer is marked by dual power supply modes, so it can be powered via 5V power bank or 110-220V power adapter. The mixer can be controlled via a linear audio input and can be connected to 2 sets of microphones. It has independent reverb effect and high/low adjustment. Made of high quality ABS material, this product is lightweight and durable to use. The length of the product is 14cm, the width is 14.6cm, and the height is 4.5cm. It is suitable for family karaoke, stage, network live-streaming, music recording, etc. It supports MP3 playback and recording, audio playback, BT playback and other functions. Item Name: Sound Mixer Material: ABS Signal Input: USB Computer /U Disk/RCA AV Interface/2 x Microphone Interface/Bluetooth-compatible Signal output: RCA Interface Input: 100-240 VAC, 50/60Hz Output: 5VDC/2A Features: Reverberation Effect, Recording, Volume Control Size Details: 14cm x 14.6cm x 4.5cm/5.51" x 5.75" x 1.77" (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 Sound Mixer 1 x 3.5 to 2RCA Audio Cable 1 x 3RCA to 3RCA Audio Cable 1 x 3.5 Female to 3.5 Female Adapter 1 x Power Adapter 1 x User Manual