Transio A60 is an RS-232, non-powered surge protector. Surges are high amplitude pulses of only several millionths of a second in duration. They can be caused by heavy-duty equipment, power lines, short circuits, or large motors. A surge protector has the ability to effectively absorb the high energy instantly, thus preventing the connected devices from damage. Features * RJ45 serial & terminal block connectors * 25KV ESD Surge Protection * LED Signals for signal state * Available in DB25M, DB25F, DB9M, and DB9F models. A60-DB25F (Transio) (1 port RS232 DB25F - surge protection) List price: $80.00 Sale price: $68.64 A60-DB25M (Transio) (1 port RS232 DB25M - surge protection) List price: $80.00 Sale price: $68.64 A60-DB9F (Transio) (1 port RS232 DB9F - surge protection) List price: $80.00 Sale price: $68.64 A60-DB9M (Transio) (1 port RS232 DB9M - surge protection) List price: $80.00 Sale price: $68.64