The AMP PA-333BT amplifier is equipped with USB and SD card slots, allowing you to play MP3 music files. It also supports Bluetooth, allowing you to wirelessly play music from smartphones and other devices. The amplifier has two microphone inputs, allowing you to connect both wired and wireless microphones. The front panel of the device has volume and tone controls for microphones and music, an equalizer for adjusting the sound, as well as a remote control for ease of operation. The amplifier can be used to connect various external devices, such as a laptop, DVD player, TV, and others. The device supports dual-zone control, allowing you to turn each zone on and off independently. The amplifier can be connected to speakers with different impedances and has outputs for transformer- and non-transformer-powered speakers. Advantages: Multifunctionality : Support USB, SD, Bluetooth and MP3 player for convenient music playback. Connectivity flexibility : Ability to connect various external devices such as a laptop, DVD player, TV and more. Sound control : Smooth adjustment of the microphone tone and volume, as well as an equalizer for sound tuning. Two microphone inputs : Connect both wired and wireless microphones. Ease of use : Remote control and the ability to divide into two zones for independent sound control. Connecting to different speakers : Outputs for speakers with different impedances and for speakers with transformers. Characteristics: Frequency range : 20–20,000 Hz Maximum output power : 100 W Resistance : 4–16 ohms/100 V THD distortion : < 0.5% Adjusting the tone : High frequencies (TREBLE): +/- 12 dB (10 kHz) Low frequencies (BASS): +/- 12 dB (100 Hz)   Separate microphone volume control : 1/2 (MIC VOL) Microphone input controls : REPEAT, DELAY Inputs for external devices : AUX IN, LINE IN Speaker outputs : 4–16 ohms, 100 V Dimensions : 28 x 19 x 7.5 cm Power supply : 220 V Детальніше: https://bassaudio.com.ua/ua/p2314928911-usilitel-zvuka-usb.html