aliexpress new invention in china GYM voice prompt timer 1,voice prompt timer clock 2,CE,RoHS 3,training/rest alternative Brief ... 2, Frame: Aluminum alloy3, Faceplate: Display window cover glassTechnical norms1,clock precision Less than2 seconds on a daily basis2,power supply ... 036556m3 company photo product lineCertificationproduct photo aliexpress new invention in china GYM voice prompt timer clock