Tera 433MHz Wireless Handheld USB Barcode Bar Code Scanner Scan Gun Label Reader with Base Super transmission distance, 500m effective open distance (50-200m indoor distance). Super inventory function, can store up to 300,000 barcodes with intelligent uploading system and support breakpoints resume. Super paring function, support one to one, one to many, many to one; one receiver can support 255 scanners; 4080 when one to one. No power consumption standby, which largely prolongs the standby time of the battery. Suitable for barcode reader places like super market,IKEA or other self-help shopping center.