uxcell Auto Car Horn Speaker Audio DIY Phase Tester PH Phasemeter Black Product Name: PH Phase Meter Color: Black; Package Content: 1 x PH Phase Meter Dimensions: 10.5 x 7 x 2.5cm/ 4.1 x 2.8 x 1.0inches(L*W*H) Material: Plastic Powered By: 1 x 9V 6F22 Battery(not included)