alien

danger

digital

futuristic

intruder

sci fi

security

hacking

radio

high tech

interface

message

radar

robotic

scan

beep

cybernetics

bleep

scanning

electronic

communication

pulsate

code

detect

detector

emergency

extraterrestrial

warning

wave

alert

alarm

signal

sonar

spaceship

system

hi tech

technology

transmitter

transmit

transmission

game

sound

ufo

urgent

delay

teleport