Broadcasts Apple's iBeacon format.(This is NOT an Eddystone URL beacon for broadcasting your website or ad message to nearby phones. That service has been SHUTDOWN WORLDWIDE by Google as of Dec 6, 2018.)Compatible with many free apps such as AutomateIt (Android), Beacon Locator (Android), Find My Stuff (iPhone), BLE Scanner (iPhone) etc.Free iPhone and Android versions of the configuration app are available (in Google Play Store and Apple App Store). Please see a screenshot of the app in the second photo of this product listing.Holes in side of beacon for easy attachment to lanyard if desiredOur website has very detailed step- by-step configuration instructions with multiple screenshots as well as a handy FAQ page for quick answers to your questions.Each beacon is packaged in an attractive individual boxSpecifications:No Monthly Membership requiredTransmission: iBeacon formatBluetooth version BLE 4.0Battery size: CR2032 (included) Number of batteries:1Battery included: yesBattery life: 300 days @ 1s (manufacturer spec)Size of iBeacon: 36mm x 36mm x 6mm (1?" x 1?" x 5/16")Weight: 8.6g including battery Waterproofing: no Password to configure: yesPower range: -23 to +4 dBmOn off switch: yesChip: TI CC2640Transmit distance: 50mAndroid app: yesiOS app: yesContact us if you have any questions about beacons or would like to order in bulk (100-100,000).