Customizable Bluetooth LED Badge

Dimensions: 90 x 30 x 6 mm. Weight: lightweight ABS plastic construction. Display: black frame with bright red LED font, supporting up to four characters per line. Battery: built-in rechargeable lithium-ion battery (charging method not specified in source, so omitted). Connectivity: Bluetooth-enabled for direct programming via smartphone app — no cables or PC required. Language support: Chinese, English, Korean, Japanese, Russian, Spanish and others. Use cases: trade shows, conferences, hospitality (waiter/guide identification), transport (bus driver/model car display), retail promotions, exhibitions, parties and live events. Message content and timing can be updated remotely and on-the-fly to suit changing contexts.