Feature: 1. Automatically Updated When Changed: Retailers use electronic shelf label(ESL) systems to display product prices on shelves. Whenever the price is changed from the central control server, the product pricing is automatically updated 2. Update Multiple Channels: With just a few clicks from the remote server, the electronic shelf price tag can automatically update thousands of videos on multiple channels at the same time 3. No Need For Paper Labels: There is no need for paper labels, and no need to deploy cumbersome store personnel to manually replace the price labels on each shelf 4. No Physically Re Label: With electronic price tag, employees in stores, supermarkets, schools, and hospitals do not have to physically re label the labels 5. Small In Shape: ESL is small in shape, easy to carry and install, and the battery can be replaced, which is convenient to use Specification: Item Type: Electronic Price Tag Material: ABS Purpose: Electronic price tag Connection Method: Bluetooth Battery Type: 2 x Button batteries in series(built-in) Battery Model: CR2450 Nominal Battery Capacity: 1240mAh Function: 1. Efficiency: 30 Minutes for less than 20,000 units 2. Success Rate: 100% 3. Transmission Technology: 433 MHz radio frequency. Non interference ability of Wi-Fi devices such as mobile phones. 4. Transmission Range: The coverage range is approx. 30 ~ 50meter / 98.4 ~ 164ft. 5. Display Template: Support dot image display. 6. Working Temperature: Normal label 0℃~40℃, refrigeration environment label -25℃~15℃. 7. Communication and Interaction: Dual wave communication, real time interaction. 8. Product Standby Time: 5 Years, the battery can be replaced. 9. Docking System: Support text, Excel, spreadsheet, intermediate data guide into, user defined development, etc.. Package List: 1 x Electronic Price Tag Note: The Bluetooth version ESL only supports for Android phones.