Feature:1. STYLISH APPEARANCE: The perfect combination of LED mark and polyester ribbon make the glitter collar cool and stylish with high visibility2. BLUETOOTH CONNECTION AND PROGRAMMABLE: 12x48 LED mark screen, colorful LED collar, very stylish, Bluetooth connection to your smartphone(for iOS 8.0 and for Android 4.3 +), app programmable pattern, text, doodle, rhythm, friendly to use3. EASY TO USE: Download the for SPOTLED app from the for iOS App Store or scan the QR code in the user manual, long press the power button to activate the LED screen and connect to the phone Bluetooth hotspot. Within the app, you can enter text or create your DIY doodle style collar to grab everyone attention4. RECHARGEABLE DESIGN: The pet dog safety collar has a built in rechargeable battery that run for more than 1015 hours on a full charge. Don't worry about taking with you on camping trips to easily handle your dog5. EXCELLENT PERFORMANCE: LED collar is made with fine workmanship, possess compact appearance, can make sure durability and stabilitySpecification:Item Type: Programmable LED CollarMaterial: FiberBattery: 1 x 602040 polymer lithium battery 450mahAPP: For SPOTLED APPConnection Mode: Bluetooth.Package List:1 x Collar1 x USB CableNote:1. Do not use your phone Bluetooth connection directly as a direct connection may result in an error message. 2. Please run the APP and connect to Bluetooth from the APP.