Often quoted as the “ultimate knock detection device”, the PLEX KNOCK MONITOR V2 has been established as the preferred choice of professional tuners and engine builders alike. With best-in-class audio quality, an embedded 2.3” trasflective LCD display and advanced audio filtering, it delivers reliable audio and visual knock detection even for the most challenging of projects as it effectively detects knock per cylinder and throughout the RPM range. Available in single and dual input versions it comes bundled with a advanced PC analysis and configuration SW.
you can get the detail info from https://www.plex-tuning.com/products/plex-knock-monitor/
single Channel without CAN BUS : 1413 NZD
single Channel with CAN BUS : 1506 NZD
Dual Channels without CAN BUS : 1581 NZD
Dual Channels with CAN BUS : 1674 NZD
(* Note: the price include GST and shipping fee(NZ POST), only in New Zealand)