1. Strong welding sound effect, super bass 2. Automatic search for Bluetooth, the receiving distance of 10M and less 3. Support MP3, WMA format music files 4. Support TF card, Bluetooth with call, file playback 5. Support external MP3/MP4/computer and other audio (AUX) input functions 6. Stereo sound quality, rising bass 7 with power bank function 8. Loudspeaker Bluetooth 5.0 with built-in DSP, saturated sound quality 9: Trendy and fashionable color matching through Apple Watch band technology 10 New color process ABS waterproof environmental protection IPX6 waterproof 11 Support portable and easy to carry, 12 Support 1+1 verse 13 Support EQ mode, free choice of three sound effects 14 Two-color molding process front net, multiple colors with shoulder strap design, easy to carry + hidden handle Output Speaker: 4 Euro 50W*1 Tweeter: 410W*2 Input Sensitivity: 400mV Separation: 90dB SNR: 80dB Working Voltage: 7.4VDC Battery: 18650: 6000 MAH Battery life: 5H-8H Total power: 60W Woofer*1 size: 4 inch Tweeter*2 size: 66mm*2 Built-in bass radiator: 90110mm*2