1Silicon storage tank, the outer shell is made of silicone shell, IP 67 standard. 2Military components, 2.4 G wireless communication for data transmission. 3Damage absorption, electrical shock resistance, power failure protection. 4Beautiful shape design, easy to operate, easy to carry. 5Can be used in any harsh environment with a working life of more than 20 years.The security patrol system is a system for recording employee patrols in various situations. It helps make sure that employees perform the specified rounds at the right time intervals and provides an almost indisputable record for legal or insurance reasons. Essentially, the system provides a way to record when employees reach certain important points in their travels. Features: Silicon storage tank, the outer shell is made of silicone shell, IP 67 standard.Long distance 2.4 G tags and 125 Khz tags are read.Military components, 2.4 G wireless communication for data transmission.Damage absorption, electrical shock resistance, power failure protection.Beautiful shape design, easy to operate, easy to carry.Can be used in any harsh environment with a working life of more than 20 years.Suitable for travel guards, patrol security, patrol guards, oil pipeline inspections and inspections, power transmission cable inspections, monitoring time and attendance rates, reporting accidents and meter readings, patrolling the army, daily round of nurses.Specifications: Condition: Brand New Material: Silica Gel Color: Shown on Picture Size: Approx. 21.5 x 17 x 7.5 cm / 8.5 x 6.7 x 3 in Plug Type:EU Plug, US Plug, UK Plug(Optional) Working Frequency: 125Khz Storage Capacity: 60,000 records Battery: 3.7V rechargeable lithium battery, 1150mAh LED Illumination Distance: 5-6m Card Reading Distance: 3-5cm IP Ratio: IP67 Charging Time: 2.5 hours Operating Temperature: -45C to 85C Working Humidity: 10% to 90% Package List: 1 * Patrol Machine 1 * Power Supply 1 * USB Cable 1 * Storage Bag 1 * Instruction Manual 1 * CD