Features: Supports 1 in 4 out, and can allocates sound signal input to four independent output channel to meet the layouts requirements of multiple speaker. Equipped with front-end signal amplifiers function, ensuring that there is no loss of signal during transmission. Each output channel is equipped with independent adjustment function, which users can adjust according to their needs. Build in comparator ensures sound quality is not affect during signal conversion and distribution, providing clear sound output. Metal housing, simple and beautiful, long service time. Specifications: Color: Black Size: about 109x79x38mm/4.29x3.11x1.5inch Signal input voltage: up to 450mV Signal to noise ratio: 120dB (A) Output power: 140mW Distortion: ≤ 0.02% Channel separation degree: ≥120dB Frequency response: 20Hz-20kHz (± 0.05dB) Output noise: less than 0.1mW Output load impedance: 16-320ohm Output impedance: 100KΩ Package Includes: 1pc 1 In 4 Output Front Staged Stereoed Signal Amplifiers Distributor note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.