4.2in TFT monitor Electronic Price Label Bluetooth Connection Price Tag Card Portable ESL 1. Multiple Applications: Retailers use Electronic Shelf Labels (ESL) to display product prices on shelves, which can be used in stores, supermarkets, hospitals, etc.2 . Automatic update: whenever the price is changed from the central control server, the product price on the label will be updated automatically.3. Simple operation: Bluetooth connection, just click from the remote server, the electronic shelf price tag can be automatically updated at the same time.4. Portable design: the electronic shelf label is small and compact, and the battery can be replaced at any time, which is convenient to use and carry.5. High efficiency: no paper labels are needed and no need to manually replace price tags on each shelf, greatly improving work efficiency. Specification: Item type: electronic price tag Material: ABS Purpose: electronic price tag Connection method: Bluetooth Battery type: x button battery 4 (shipped with built-in battery) Battery model: CR2450 Nominal battery capacity: 2480mAh Features: 1. Yield: 30 minutes for less than 20000 units2. Success rate:3. Transmission technology: 433MHz radio frequency, anti-jamming ability of WiFi devices such as mobile phones.4. Transmission range: Coverage range approx. 30-50 meters/98.4-164ft5. Display template: support dot matrix image display6. Working temperature: normal label 0-40, refrigeration environment label-25-157. Communication and interaction: two-wave communication, real-time interaction8. Product standby time: 5 years, battery can be replaced9. Docking system: support text, Excel, tables, intermediate data import, user-defined development etc. Package list: 1 x electronic price tag Note: ESL Bluetooth version only supports for Android phones.