- SOS button is IP55 waterproof,battery is included.
- The operate range is 260ft in OPEN area.
- Can be put in pocket or hang on neck with pendant (included).
- Can be expandable with the BITIWEND receivers.Pairing steps are same.
- FCC, RoHS certified.3 months money back promise and 1 year quality Warranty. Any quality problem of the item,please contact our customer service team directly