1. Holds 6 messages ( NO.1 can store 512 characters, NO.2 to 6 can store 256 characters) . Letters, numbers and simple images are supported. 2. 9 speed and brightness levels. 3. Just manual program with three onboard buttons. 1pc of CR2032 battery. more than 20 hours continuous battery life. 4.Various color for choosing 5. Accessory: Specification and 1pc of CR2032.