Check the listing for details. Matrix BOOM! Portable Wireless Speaker. Condition: New. Listed at 99.99 USD. Speaker Dimensions: 13" x 5" x 7.5", 4lbsWireless audio: Stereo sound with MAX 10m liner receiving rangeWireless communication: Provide clear sound by using high fidelity wireless chip, no echo or tiny voice occurredTF function: Power-off memory and loop playback functionUSB function: Power-off memory and loop playback function; USB output: DC 5V/1AAux-in: Easy to connect with laptop, mobile phone and other device with a 3.5mm audio cableTWS (true wireless) function: Player A and player B could play same music source by wireless connecting In the Box: (1) Matrix BOOM! Portable Bluetooth Speaker(1) Charging AdapterSpecifications Brand: Matrix Ports: DC 5V Output Port; USB Port; TF Card Slot; AUX-IN; Charging Port; Wireless Button Controls: Previous Song/Volume Down; Power/Mode button; TWS Button; Next Song/Volume Up; Play/Pause/Phone Answering/ Hang Up/Call rejection Output Power: 2x13W; Working voltage: DC 7.4V; Built-in battery: 2X2000mAh. Input Voltage: DC 9V Output Voltage: DC 5V Frequency: 60Hz-18KHz BT Version: 4.2 BT Operating Range: 10m (No Obstacle Distance) SNR: >70dB Distortion: ＜10% Support: MP3 Bite Rate: 32kbps-320kbps