the pulse box and pieps box both have the multi burials features ,which i use .if you have 2 dogs collared up up stand over first dog and it will say mark on the screen ,when the second dog is located after being entered into a earth it will do the same ,once you locate the dog and screen says mark thats bang on the dog ,and is abit better than just reading the numbers which it doe,s if only one collar is used ,plus it save,s on keep turning collars on and off and changing from dog to dog ,dont think many people have picked up on this so i thought i,d give it a mention ,dont, no if the orto do