1.remotely control hand coal drill 2.protection of short circuit,over load,current leakage PurposeThe device is ... 127V,1.2W handheld coal drill remotely.It has the protection functions of short circuit, over load, current leakage.Technical Data ... : current leakage resistance(KΩ)response time: current leakage resistance(S) protection distance:short circuit(M)connection moderated voltage(V)rated current ...