You can get the T.B.Silence with PWM or with manual speed control via a rotary knob. Here are the specifications and pricing:
- UCTB8A (80mm / manual control) | 800 - 2500 RPM (speed) | 10 dBA (minimum sound output) | €6.99
- UCTB12A (120mm / manual control) | 800 - 1500 RPM | 10 dBA | €10.99
- UCTB8P (80mm / PWM) | 500 - 2200 RPM | 8 dBA | €8.99
- UCTB12P (120mm / PWM) | 500 - 1500 RPM | 8 dBA | €12.99
Source: TC Mag