Product UPC: 808736230902 HP J4131B ProCurve Gigabit-SX Transceiver 1 x SC 1000Base-SX port (IEEE 802.3z Type 1000Base-SX) Ports: 1 x SC 1000Base-SX port (IEEE 802.3z Type 1000Base-SX) Max Distance: 220 m (62.5 ??m core diameter, 160 MHz/km bandwidth) 275 m (62.5 ??m core diameter, 200 MHz/km bandwidth) 500 m (50 ??m core diameter, 400 MHz/km bandwidth) 550 m (50 ??m core diameter, 500 MHz/km bandwidth) Dimensions: 3.8" x 2.05" x 0.95" Weight: 0.09 lbs. Parts: 1 year limited Labor: 1 year limited