Product Name: 15 Inch Super Bass Battery Trolley Loud Speaker Box Model NO.: A15-2 Compatible Product: Universal Display Type: Digital Display SNR: 70-80dB Chargeable: Chargeable Special Function: Memory Card Support, USB Disk Support, With Remote Control, Radio Usage: Portable Player, Mobile Phone, Computer, Stage/DJ, Home Theatre System, Radio, TV, Karaoke Speaker Material: Plastic Amplification Type: Active Type: Bluetooth Speaker Function: USB/TF,Bluetooth,Radio Woofer: 15'' Woofer+3''tweeter Battery: 11.1V/6600mAh Lithium Battery Power: 50W Color: Black Packing: Brown Box,Unit/CTN Net Wegith: 12kgs Material: Plastic Remote: Remote Control Application: Indoor and Outdoor Channels: 2(2.0) Packing Size: 415*345*650mm 40hq: 680PCS 40gp: 580PCS 20hq: 280PCS Trademark: Temeisheng Transport Package: Brown Box Specification: Packing size: 415*345*650MM Origin: China HS Code: 85182200 Product Description Product detailsMIC.Volume:Turn the knob to adjust microphone volume level.ECHO (MIC): Turn the knob to adjust microphone echo.BASS: Turn the knob to adjust master bass level.TREBLE: Turn the knob to adjust master treble level.VOLUME: Turn the knob to adjust master volume levelDC 15V IN/9V IN: DC15V/9V Power adaptor input, PLEASE onLY USE INCLUDED AC ADAPTER PROVIDED IN THE PACK.(RED = Charging, GREEN = FULL) .MIC IN (Microphone input): Plug wired microphone this socketEXT DC 12V IN (external 12V battery interface): Connect external 12V charging/power as alternative power source; please check carefully the input polarity before connecting.AUX IN (external audio interface): 3.5mm stereo input for connecting external audio devices. You may connect your Smartphone I Tablet as external music source with a 3.5mm line-in cablePOWER (power switch): main ON/OFF switch for the speaker.(Note: Battery charging is independent of Power switch ON/OFF status)key(MODE):lt is for switching between different audio sourceLINE-IN /FM mode(radio mode)/ MP3 playerVoice prompt (on/off:Hold this button for 2 seconds to enable/disable the voice prompt on/ off function. Company profileTEMEISHENG has become one of the most popular audio brands in China and in the global world after 20 years of great efforts!