This is FTDI Chip Model with LED's per port for TX and RX and Power.
Features Specification
Bus powered
1 USB to 4 ports RS-232
Standard USB To 4 RS-232 Adapter
Easy to install , Plug & Play
PDA RS-232 Port support
56K Modem support
Serial Mouse support
Serial PC camera support
Max speed: 9,600 up to 230,000 bps
RS-232 for DTE Mode
Fully compliant with USB Spec.
For Win-98/se/me , Win-2000 Win-NT up 5.0 Ver,Win-XP MAC OS. 8.6 up ,Linux

AUM140-P Prolific Chip (No LED Indicate)
AUM140-F FTDI Chip (With 3 LEDs Indicate)
LED Indicate : Power, TX, RX (AUM140-F)
USB1.1 & USB2.0 compatible
USB Cable ----- USB A / M +15cm cable
RS-232 -- DB9 / M + cable * 4
Head cable length
1: 5cm
2. 15cm
3. 27cm
4. 39cm
Housing : Molding
Weight : 250g
Length : Total 75cm