B&O PLAY A1 Portable Bluetooth Speaker - Black (1297826)B&O PLAY A1 Portable Bluetooth Speaker, Black version. Model: (1297826). The A1 speaker captures B&Os Signature Sound and sleek style in an ultra portable package. With up to 24 hours of battery life per charge, it lets you keep playing tunes and making calls on the go. A dust and splash resistant aluminum dome makes this speaker an elegant accessory wherever you take it; or wherever it takes you. For the Autumn and Winter Collection, the A1 wireless