Speed measurement: support Function: support PWM temperature control speed regulation Interface: motherboard 4PIN interface Keep the best continuous running time at 180,000 hours. It has maintenance-free double ball bearings, long service life, and sufficient cooling air flow and air pressure. Model: FFB1212SH Bearing: ball bearing Standard voltage: 12V Current: 1.24A Power: 14.8W Speed: 3700RPM Volume: 140.16CFM Noise: 54.3dBA Lead: 4 wires Colour:black Material:plastic Size:120 x 120 x 25mm Package Contents: 1 x Cooling Fan Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.