SKYSONIC T-902 wireless system with flexible arm. - Brand: SKYSONIC - Model: T-902 - Accessories: Instruction manual, connection cable - Features: Wireless system with flexible arm Thank you for viewing. I'm selling this because I've only used it once and bought a new guitar. It's like new. I'll include the button battery that came with it when I bought it. I bought it 2-3 months ago, so I think it should still be usable. It also has a microphone, so I think it's a very good product that picks up the sound even when you tap the body of the guitar.