variety of colors to choose from Default color is black If you need to change other colors Please leave message to us for change within 12 hours of order submission Brand: PURIDEA Interface Type: USB Power Output power: 3 W Bluetooth protocol: 4.2 Whether to support application: No Housing material: metal Power supply mode: USB Connection method: Bluetooth connection Frequency response range: 200-10 KHz Mode of communication: power supply: built-in lithium battery Mode of operation: button Shell material: metal Is there a radio function: none Product weight: 0.18 (KG) Type: Bluetooth speaker Battery capacity: 500 mA Signal to noise ratio: 75dB Effective distance: 10 meters Display: None Speaker adjustment method: button + button