Luxury Bluetooth speaker that produces intense crystal-clear stereo sound and has a metal front screen which can be branded in spot colours or stunning full colour. It is compatible with all mobile devices that support Bluetooth and has a wireless connectivity range of over 10 metres. Quantum can also be used with an audio cable and has a battery saving standby mode which supports a continuous playing time of 5-6 hours. It is easily recharged from a laptop, a power bank or a USB mains adapter. Music playback can be controlled directly from the speaker and it has a built-in microphone for phone calls. It is presented in a gift box with a Micro-B USB cable, an audio cable and an instruction leaflet. Quantum laser engraves to an oxidised white colour.