Features: brand new and high quality PCB board size: 105x54mm/4.13x2.13inches. This palette includes 10x pre-amp and treble, mid-range, , and volume controls. The kit is equipped with an op-amp IC socket, which is flexible to use, easy to upgrade, and suitable for different tastes. The wiring of the circuit board is reasonable, the noise is low, and the component layout is beautiful and generous, which can satisfy your critical eyes to the greatest extent. The components are carefully selected, using the cost-effective NE5532 op amp, Black King for BP electrodeless coupling capacitors, 1% metal film resistors, CBB capacitors and so on. Specifications: Material: ABS Color: As the Picture Shows Product Dimension: approx. 105x54mm/4.13x2.13inches Net Weight: 90g/0.20lbs Note: Please allow 1-2cm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1Set XH M164 Tone Board Tone Board Preamp