Smallstar SFC-1 High Performance Digital Power Amplifier with 6 Electronic Tube for HiFi Audio Features: - High fidelity - High cost performance - Excellent transformer - 6 Electronic tube - Manual test - Bluetooth 5.0 chip - Independent decoding chip - A main board with stable performance - Professional tuning - One touch control - Full frequency speaker unit Parameter: - Rated output power: 7W - Speaker impedance matching: 4-8O - Total harmonic distortion: 3% (1kHz) - Input impedance: 100kQ - Weight: 8.2kg - Package size: 365 x 305 x 270mm - Input sensitivity: 400mV - Bluetooth version: 5.0 - Frequency response: 20Hz-20kHz (±1dB) - Output impedance: 4-8O - Signal-to-noise ratio: 86dB - Operating voltage: AC220V Package Included: - 1 x SFC-1 - 1 x Power cable. Usually it costs about 30USD-50USD. If you receive the item that not satisfied or defective, please do not open case and kindly notify us within 30 days. This item is in the category "Consumer Electronics\TV, Video & Home Audio\Home Audio\Receivers & Amplifiers\Amplifiers & Preamps".The seller is "ianalyzer" and is located in this country: CN. This item can be shipped worldwide.