Overview: Features at a Glance:1) Fits in a shirt pocket for vonvenience 2) All outer surfacesare non-conductive for safety 3) Detects voltage without metallic contact 4) Quickly locates the hot, neutral & ground terminals in any receptacle. Type of battery:1.5V AAA Alkaline x 2pcs (Not included) Read First: Safety Information To avoid possible electric shock or person injury 1) Do not use if tester appears damaged, the casing is broken or tester can not work normally.2) Do not apply more that rated voltage as marked on the tester.3) Use caution with voltage above 30V ac as a shock hazard may exist. Before each use, make sure tester is in order or not by testing a known working circuit that is within the rating of this unit, when the tip of tester lights, it means voltage exist, if no any indecations, voltage could still be exist, Do not rely on this unit with shielded wire. Operation may be affected by differenece in socket design & insulation thickness & type. Note: If the color out of our stock, we will ship the item in random. Specification: Weight Approx:70g Size Approx:14.5 x 2.5 x 2.5