Display Screen: No Speaker Type: Portable APP Support: No Communication: USB Apt-x Support: No Audio Crossover: Two-Way Smart Personal Assistant: None Remote Control: No Waterproof: No Number of Speaker Enclosures: 1 Power Source: AC Built-in Microphone: No Battery: No Channels: 2 (2.0) Smart Personal Assistant: None Specifications: Model: -100 Maximum Speaker Power: 8W Color: Black Material: ABS + Metal Size: 80 x 70 x 40 mm Plug: 3.5 mm Line length: Package Contents: 4 x -100 External Radio Speaker Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in a little different from the real thing. The measurement allowed error is +/- 1-3 cm.