We are happy to accept payments in GBP, USD and EUROS We are happy to accept payments in GBP, USD and EUROS We are happy to accept payments in GBP, USD and EUROS


Tuesday, December 12, 2017



TSI Autumn Fire Sale!


30% Off Selected Models

Sold on a first come, first serve basis. While stocks last!

We have a number of the units from the TSI Demonstration Sales Inventory that we are selling at aggressively discounted prices.

This is equipment that is typically used at shows and has seen minimal time in the field.

These products will be cleaned up, recalibrated, and come along with "as new warranty coverage".

Please click here to see the product list. We are offering a massive 30% off list prices on all of these products.

This promotion is run on a first come, first serve basis; so please get your orders in early.

To receive a quotation, please contact us using the details below.

Keison International Ltd. trading as:
Keison Products, VoIPon Solutions & 4Gon
keison VoIPon Solutions 4Gon