 Several chipmakers including Cambridge Silicon Radio, Dialog Semiconductor, Nordic Semiconductor, STMicroelectronics, Cypress Semiconductor, Silicon Labs and Texas Instruments had introduced Bluetooth Low Energy optimized chipsets by 2014.Devices with peripheral and central roles have different power requirements.A study by beacon software company Aislelabs reported that peripherals such as proximity beacons usually function for 1–2 years powered by a 1,000mAh coin cell battery.