any machinery, mechanisms and computers it is applied to, allowing it to open locks, detonate explosives, remotely activate electronics, override most systems, activate computers, and cause some energy weapons to burst into flames or sparks. There is technology the sonic is unable to interface with, such as wood, or the isomorphic controls seen in "A Christmas Carol". It also is capable of causing chemical reactions that allowed the Doctor to turn eye glass lenses black like sunglasses and causing cut barbed wire to regenerate (setting 2428B). It is also capable of detecting, amplifying and controlling certain energies, sound, signals, frequencies, and waves, allowing the Doctor to intercept a teleporting individual and send them where he chooses, scan and identify matter, send out communications, enhance sounds, signals and frequencies, and acting as a catalyst or conduit for energies. Sonics are also capable of calculations, such as The Day of the Doctor (2013), when the War Doctor used calculations to allow the sonic to work on wood, the calculations of which appeared partly done on the Tenth Doctor's sonic and completed in the Eleventh's. The War Doctor also used his sonic in tandem with the Tenth and Eleventh's to create a force field wave to repel a Dalek. These are more specific functions of the sonic screwdriver: Unlocking or locking a door Burning or cutting certain substances Remotely detonating specific machines or explosives Amplifying sound-waves and the power of an X-ray machine beyond its normal capacities Disarming weapons and electronics Flashlight Intercepting and conducting teleportation Hacking an ATM Regenerating barbed wire on a fence Darkening eyeglass lenses to transform them into sunglasses Microphone (when connected to an audio amplifier) Detecting and interpreting signals Conducting medical scans Fixing Locking the coordinates of the TARDIS Tracking alien life Using red setting or dampers Controlling the properties of atoms and molecules on a small scale Operating computers, whether their origin is alien or human Providing geolocation Lighting candles Creating a force field wave with two (or possibly more) other sonics to physically repel a Dalek (it may have to be the same sonic device at different points in its own time stream) Modifying a mobile phone Disclosing and deactivating camouflage Disarming robotics Scanning and classifying matter Shattering glass Creating an "acoustic corridor" for speaking with someone far away Shocking neural centers of living organisms Downloading a person's consciousness and transfer it into a computer hard