Features:Application: Circuit detector is a practical auxiliary tool designed for detecting low voltage direct current circuit faults of transportation machinery. It can be used in the maintenance of transport aircraft such as cars, motorcycles, bulldozers, rollers and excavators.Non-slip Handle: The rod body is made of insulating material, and the non-slip design does not hurt the hand and feels comfortable.How To Use: Plug and play, directly insert the test lead into the round hole at the end of the adapter clip to use. Fast and convenient, universal all kinds of pens.Matters Need Attention: 1.Only suitable for 0-100v Dc (DC) power supply environment circuit, do not use for all Ac power supply environment. So as not to cause damage to the instrument motherboard. 2.The head of the marker is sharp. Please use it carefully and keep it out of reach of children.What You Get: 1xCircuit Tester. 1x9V Battery. 2xTest Leads(1 red and 1 black). 2xConnecting Clip(1 red and 1 black). 1xUser Manual. Specifications:Item name: Circuit TesterWorking conditions: -10 to 40Test leads: 1 red and 1 black (total length: 110CM)Connecting clip: 1 red and 1 black(total length 62MM)Size: Approx.150*75*30mm/5.90*2.95*1.18inWeight: About 345g/12.16ouce Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 10-30mm. Return Policy All of our items come with a 30-day free return policy. If you need to return, please contact us, let us know the detailed problem and send us some pictures for confirmation. We reserve the right to refuse any returns for objective reasons. Shipping Policy All of our items are shipped free with tracking numbers. Orders will be shipped within 3 working days upon receipt of payment. Most orders will be shipped within 1 working day. In most cases, shipping takes 8-12 working days.