Not my cup of cha cha cha, but I think this is at least £6 cheaper than places like Woolies, John Lewis and Argos.
"Relive the Clone Wars with this realistic Clone Trooper mask
Features 3 modes: voice changer, Clone Trooper phrases and radio static
Requires 3 x AA batteries (included)
For ages 5 years and over
Dimensions: 27 x 25.4 x 30.2 cm"
Apologies if already posted.