Remind: Buzzer, flash Alarm distance: 50 meters Number of managenment: Connection 6 strips at the same time. Log in with Facebook, Twitter to use Nut 2. Battery: CR2032(for backup) The maximum range of the device is 50m. APP:Please visit www.nutspace.com/download.php Note: 1. The nut 2 can compatible with: Android Phone: The phones that have the Bluetooth 4.0 and Android system version 4.3 and above. iPhone: iOS 7 and above. 2. The nut can not connect to my phone. Answer: Please try this method follow:You can press the button until you hear the beep sounds, and then press it four times immediately, try to connect with the phone again. 3. Why the app is the chinese software? Answer: Please close the APP and try to change the phone system language to english, and then open the APP again. 4. Language: Just have chinese and english. 5. Need a twitter or facebook account to login. Box Contains:1 x Nut 2nd Bluetooth Tracking Tag 1 x CR2032 Battery (for backup) 1 x English Manual