Free thermal socks with your purchase! A cutting-edge UK market first and the very latest in wearable technology , these insoles can be controlled directly from the comfort of your smartphone. You'll be set up in no time with the fun and innovative bluetooth smartphone app that allows you to control the temperature or even schedule your insoles to turn on at the perfect moment. These hi-tech insoles can be charged from a USB port , using any existing USB wall plug, PC or laptop. There's no need to worry about how much charge you have either, with a handy battery level indicator readily visible on the app, and if you're not sure whether your insoles are turned on, there's a convenient power indicator to set your mind at ease. Designed with your ultimate comfort in mind, these insoles are ergonomically shaped and contoured to give you that tailor-made feel. Thin enough to work with virtually any shoe, boot or even slipper, they are still thick enough to provide perfect levels of cushioning to help keep your feet warm even when not switched on. It is of course possible to trim these insoles to size to obtain the perfect fit. We've also included a handy carry bag! Features Free and fun Bluetooth mobile app functionality - control your insoles straight from the comfort of your smartphone Battery level and power indicators - no need to worry about how much remaining charge you have Fuss-free convenient charging using the micro-USB cable with any existing USB wall plug, PC or laptop port Charge on the move - using any micro-USB car charger or battery powered micro-USB charger pack Two-way split charger cable - charge both insoles at the same time Wireless operation - completely self-contained battery means no fuss Bright LED charge indicator - check at a glance your insoles are switched on or charging Advanced far-infrared heating element distributes heat gently and evenly Made from ultra thin material - lightweight ergonomic design for that tailor-made feel Adjustable to your shoe size - trim the soles for the perfect fit following size guide Choose your own settings for heat and time - no fiddling with switches Waterproof design - perfect for hiking, fishing and other outdoor hobbies Heat output setting temperatures range from 95-131Â°C Automatic turn off after 2hrs unless otherwise chosen Battery can last up to 4hrs on a single charge, dependent on heat setting chosen Specifications Small - EU: 36-38, USA: 4Â½-6 Medium - EU: 39-41, USA: 7-8Â½ Large - EU: 42-44, USA: 8Â½-10Â½ Li-ion battery Unisex design Click here for the Rechargeable Waterproof Insoles with Remote Control Click here for the Rechargeable Waterproof Insoles Bluetooth Operation These insoles can be controlled straight from the comfort of your smartphone with the free Smart Warmer app. You can control the temperature or even schedule your insoles to turn on at the perfect moment. There's no need to worry about how much charge you have either, with a handy battery level indicator readily visible on the app, and if you're not sure whether your insoles are turned on, there's a convenient power indicator to set your mind at ease. Once you have synced your insoles with the app, simply change to the second menu and switch them both on together at the press of a button. Simple and fun to use , just install the app and sync the insoles. You can even name the insoles to make them easily identifiable. Heating Element The far-infrared heating element in these insoles is placed beneath the toes, as this is the part of the foot most susceptible to the cold. The infrared technology provides gentle, soothing heat for up to 4 hours on the lowest heat setting. It can also aid in the relief of Raynaud's Disease . Rechargeable Battery The battery used in these insoles is rechargeable , and can be used for up to 4 hours, depending on the temperature setting. This time can be further increased by only switching the insoles on for short bursts as needed. The cable plugs into a convenient micro-USB port in the side of the heel, so there is no need to remove the battery in order to charge. The insoles also come with a USB cable which can be used for both insoles at the same time, using any existing USB wall plug, PC or Laptop. You can even charge these insoles on the move with any other micro-USB car charger or battery powered micro-USB charger pack. Ergonomic Design These insoles have tapered edges, which makes this ergonomic design extra comfortable, no matter which pair of shoes you have put them in. These edges provide extra support for the side of the foot, as well as ensure the most amount of heat reaches you. The rest of the insole is thin to make them easier to place inside a shoe, and make sure they remain lightweight. Handy Carry Bag The carry bag included with these insoles ensures they are looked after. With a useful drawstring at the top, this insole can be hung up or stored out of the way. Trim to Size These insoles can be trimmed to achieve a perfect fit and are completely waterproof . This makes them versatile, and means that they can fit into many different types of footwear. They are perfect for anyone who works outdoors. Smart Warmer App: Scan the QR code or view the instructions for Android users Scan the QR code or view the instructions for iOS users You can either search within the App Store or Google Play, or alternatively if you have a barcode scanner app already installed on your phone, you can scan the appropriate QR code above. Android users should scan the left hand side QR code, and iOS users should scan the right hand side QR code to be taken to the correct store.