1. Working distance: Up to 260m (open outdoor area)
2. LED ring color: Blue
3. Ringtones: 15 polyphonic melodies
4. Volume: 4-level volume control
5. Operating voltage: 98698: Built-in polymer rechargeable
battery 2000 mAh 3.7V DC (included) 90139: Self-powered
6. Standby time: Max. 6 months
7. Working modes: Vibration,Sound+Flash,Sound+Flash+Vibration
8. Transmitter: Lifetime >100,000 push times
9. Transmitter waterproof: IP44
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