1. No need writting/ stand-alone /easy to set up
2. with colorful waterproof, hot-proof,wristbands that can be put on wrist, make movement easily.
3. With external power interface (Audio interface) for emergency.
4. Auto-rebounce function without handle, easy operate.
5. Applicable to agent , school, spa/sauna bath center, swimming pool, gym, golf, supermarket, hotel, company, factory, business, household, etc.