how can i get the confirmation tone shut off if this is even possible

Tech Specs:

Material:

Plastic 

Antenna:

External 

Optimal Range:

14 Miles (1 mile in urban conditions) 

Frequency:

7 FRS, 8 GMRS 

Channels / Privacy Codes:

22 / 121 

Battery Type:

3 AAA, NiMH 

Battery Life:

[Alkaline] 19hrs; [NiMH] 11hrs 

Other Features:

Channel scan, scan channel delete, monitor channel, 10 call alert tones, keypad lock, QT noise filter, 1 dual drop charger, 1 charging adapter, 2 NiMH battery packs, low battery alert, drop-in & plug-in charge compatible, audio accessory connector 

Recommended Use:

Skiing, hiking, climbing, touring 

Manufacturer Warranty:

90 Days 

Country of Origin:

China