Features Signal Detector --- The detector can detect the concealed signal sources around you, building you a safe environment for working and business. Higher Accuracy --- LED infrared detection together with glass lens filter ensures high accuracy without leakage, very stable in signal receiving. Built in Battery --- Comes with a built in 110mAh battery, the signal detect can work continuously for 24 hour, can also stand by for 100 days. Extensive Using --- Allows for better application in schools, hotels, conference rooms, hospitals, automobiles, confidential meetings and so on. Simple Carrying --- Light in weight and compact in size as well, the camera finder can be easily carried for both indoor and outdoor using. Specification: Item Type: Signal Detector Material: ABS Battery: 1 x lithium battery, 110mAh. Shipped with built in battery. Charging Power Supply: DC 5V 1A Application: Widely used in schools, hotels, conference rooms, hospitals, automobiles, confidential meetings, research and development centers, etc.  Package List:1 x Signal Detector 1 x Lanyard1 x Charging Cable Package List 1 x Signal Detector 1 x Lanyard 1 x Charging Cable