Silver red blue ● output power: 5W *2 Low magnetic trumpet: 4 Ω 10 w ● input sensitivity: 400mV ● signal-to-noise ratio: ≥80dB ● working voltage: DC 5V ● built-in bluetooth wireless transmission, call hands-free ● stereo audio transmission protocol (A2DP V1.2) ● supports playing MP3 songs stored in the TF card ● supports all audio input from the external 3.5mm terminal ● support FM automatic search ● support for recyclable charging ● built-in battery actual capacity: 18650 1200MAh Size: 220*77*82.5mm color box; Box size: 46*43.5*37CM net weight: 28.5kg gross weight/box: 31KG PCS/ box: 40pcs The spot