Marshall Middleton Bluetooth Portable Speaker

DRIVER TYPE: Dynamic FREQUENCY RANGE: 50 Hz-20,000 Hz DRIVERS: Two 3” 15W woofers, Two 3/5” 10W tweeters, Two passive radiators ADJUSTABLE BASS AND TREBLE CONTROLS: Fine-tune your music using the analogue controls on your speaker MAXIMUM SOUND PRESSURE LEVEL: 87 dB SPL @ 1 m STEREO/MONO: Stereo CABINET PRINCIPLE: Sealed with passive radiator POWER AMPLIFIERS: Two 20 Watt Class D amplifiers for the woofers, Two 10 Watt Class D amplifiers for the tweeters BATTERY TYPE: Built-in, rechargeable Li-ion battery PLAY TIME: 20+ hours QUICK CHARGING: 20 minutes charge gives 2 hours of playtime CHARGING TIME: 4.5 hours WI-FI: No, WIRED CONNECTIVITY: 3.5 mm Input TOP PANEL CONTROLS: Multi directional control knob: play/pause, skip track, volume control, on/off, Bluetooth pairing button: connect to your device(s) and activate Stack Mode, Battery and volume indicator, Treble and bass controls MICROPHONE SYSTEM: No VOICE COMMAND:L No CUSTOMISE SOUND: Yes, on speaker and in app BLUETOOTH RANGE: 10 m, 30 ft CONTROL KNOB: Yes CODECS: SBC WIRELESS CONNECTIVITY: Bluetooth 5.1