Doctor Who Sonic Screwdriver - Fifth (5th) Doctor - Peter Davison Here's another multi-purpose Gallifreyan device to add to every Whovian's sonic screwdriver collection. This is the 5th Doctor's sonic screwdriver with realistic sound effects. The 5th Doctor Sonic Screwdriver requires 3x 'L1154' batteries which come included. Measures about 8 1/2-inches long. Ages 5 and up.