Every fitness enthusiast knows that it takes effort to work your adductors. The Gymterior Shake Box can help with that. It has a USB rechargeable design with 4 vibration levels up to 2400 percussions per minute. You will just have to use this 3 minutes. This exercise tool has 20-minute auto-off function.
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The Shake Box can be used as a massager for other parts of your body. It lasts up to an hour on battery. This looks like a tiny plastic cube, so you can store it away and take it with you anywhere. You can find out more about it here.
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