Comfortable Wear
Design Patent
R & D input 7500USD
Designed in 2018. April
Dual color, dual hardness, integrated core technology
R & D input US$7500
Designed in February, 2020
Control Distance 800m+； Super Long Standby
Designed in September. 2019
Powerful, easy to hold, different grinders optional
design Patent
Designed in November, 2019
built-in battery, alone use or multi match to use
Designed in December, 2019
Rope tightness adjustable , Rope replaceable
Design & structure Patent
R & D input US$22000
Three level. LED light, 2pcs Different Grinders
R & D input US$6500
Designed in January, 2020
