Black 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 ● couplet sound, mobile power, EQ sound switching Bare machine size: 245*90*70mm color box size; 247*95*83mm net/gross weight/set: 740g/810g/ PCS outer box size: 51*41* 42.5cm net weight: 32.5kg gross weight/box: 34KG PCS/ box: 40pcs The spot