We are official store. 100% genuine product and full warranty. It can test how powerful you are，Our products are very strong and durable If you don't want to pay customs duties, please contact the store customer service. Or comment on your order. We will use special modes of transportation for you. （Not all countries can let store customer service check for you） Bluetooth connection, accurate measurement Using professional sensors,，It can withstand 5000 tons of testing，8500 monitoring data per minute,Connect with mobile app via Bluetooth，Transfer data to the phone,Voice broadcast power, frequency, speed Charging for 2 hours, using time of 100 hours APP supports Android and IOS 1: android APP(7.1 or above). Download url: www.ql-sport.com/download/FightTech.apk IOS: search FightTech in apple store APP supports languages in many countries It is very suitable for Taekwondo， There are three colors to choose from Black, light green, red

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