booster pro 2 percussion massage therapy massage gun: quiet + powerful. vibrating deep tissue ball head, deep tissue massage gun, latest noise reduction technology booster cordless portable muscle massage gun, subverting traditional massage gun<br><b>less noise:</b>the new tachnology of lowing noise allowsyou use it at your will in apartment, gym and public places without worrying bad impression. <br><b>longer battery life :</b> <br> equipped with 24v 2000mah power lithium ion battery, you can use consecytive 4-6 hours in the highest gear. just charing for 1.5 hours, don’t worry batery usage anymore. <br><b>more gear shifts:</b><br>owing 9 gears of strike speed with memory function, choose the gear that most suits you given your muscle adaptation. we suggest doing single muscle group massage for about 10 minutes. and using the middle and low grade massage for your core muscle group after drastic exercise.<br> <b>superior after-sales:</b><br>if the massage device happens the non human issue, we guarantee exchanging the new one for free within 1 year. there will be our connection way in the package, welcome to consult.<br>no matter is professional athlete or fitness lover, must have muscle ache due to over exercise. booster is due to design for this.<br>adopt scientific vibration frequency and amplitude, relieve muscle spasm, reduce the muscle recover time sharply<br><br><b>parameter:</b><br><b>size</b>: 285mm*200mm*60mm<br><b>weight</b>: 2.40kg<br> <b>rated voltage</b>: 100v-240v<br> <b>vibration frequency</b>: 50-60hz<br> <b>number of vibrations / min</b>: 3400 times<br> <b>battery capacity</b>: 24v 2000mah lithium battery<br> <b>working hours</b>: 4-6 h<br> <b>charging time</b>: 90 min<br><b>package:</b><br> 1 piece of massage gun host<br>5 pieces of massage head attachment<br>1 piece of power adapter<br>1 piece of accessory storage box<br>1 copy of instruction manual<br><b>tips:</b><br>avoid ueing over 30 minutes continuous use, use again after 5 minutes of shutdown<br>not suitable for using on human head and reproductive organs<br>children are forbided using the product.