This refurbished Fosi Audio BT10A integrates Bluetooth 5.0 connectivity with 50 watts per channel of amplification, utilizing Texas Instruments TPA3116D2 chipset for transparent, noise-free audio reproduction. Extended wireless range of 39 feet accommodates flexible room placement while independent bass and treble controls enable personalized tonal shaping. The compact form factor and aluminum construction suit desktop, bookshelf, and compact speaker applications without sacrificing sonic clarity or amplifier stability. Built-in speaker protection circuitry safeguards connected drivers, while the included power adapter enables immediate deployment. Engineered for discerning listeners seeking high-fidelity wireless amplification in space-constrained environments. Backed by 24-month warranty coverage.   Model BT10A MAX Power Output 50W x 2 Terminating Impedance 2-8Ω Input Mode Bluetooth + 3.5mm AUX Output Mode Speakers Out Input Sensitivity ≤ 280mV Frequency Range 20Hz - 20kHz (±1 dB) THD ≤ 0.04% SNR ≥ 98dB Chip Set Texas Instruments 3116D2 Bluetooth Transmission Distance Up to 39ft/12m DC Input Range 12-24V Power Supply 19V/4.74A