Wireless Signal Detector Detection Pinhole Lens Travel Anti-Theft Camera Hotel Alarm Anti-Theft MonitorFeatures: Vibration induction powerful shock once the shock immediately issued a powerful alarm sound thieves were defeated and fled Product information: Material: ABS plastic Battery capacity: 350 mAh Operating current: 30 mA Continuous work: 8 10 hours Charging time: 1 2 hours Product size: 85 * 40 * 10mm 3. 34 * 1. 57 * 0. 39" Packing list Wireless signal detector*1