Logitech S135i, 2.0 channels, 3.5 mm, Black, AA, 10 h, 14.1 oz (400 g) Logitech S135i. Audio output channels: 2.0 channels. Headphone connectivity: 3.5 mm. Product color: Black. Battery type: AA, Battery life (max): 10 h. Weight: 14.1 oz (400 g)