Some critics imply or explicitly argue that vegetables and fruits are inherently all heavily concentrated sources of carbohydrates (so much so that some sources treat the words 'vegetable' and 'carbohydrate' as synonymous).  While some fruits may contain relatively high concentrations of sugar, most are largely water and not particularly calorie-dense. Thus, in absolute terms, even sweet fruits and berries do not represent a significant source of carbohydrates in their natural form, and also typically contain a good deal of fiber which attenuates the absorption of sugar in the gut.  Lastly, most of the sugar in fruit is fructose, which has a reported negligible effect on insulin levels in obese subjects. 
Bluetooth Low Energy is designed to enable devices with low power consumption. Several chipmakers including Cambridge Silicon Radio , Dialog Semiconductor , Nordic Semiconductor , STMicroelectronics , Cypress Semiconductor , and Texas Instruments have introduced their Bluetooth Low Energy optimized chipsets over the last few years. 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 with a 1,000mAh coin cell battery.  This is possible because of power efficiency of Bluetooth Low Energy protocol which only transmits small packets as compared to Bluetooth Classic which is also suitable for audio and high bandwidth data.