1. With Recharge jack, can be recharged.
2. With headset jack, it can be used in noisy environment.
3. Audio or vibratory alarm, when turn it on or off.
4. The yellow light will turn on when it is low power.
5. Low consumption, one new battery can sustain working for about 40 hours.
6. Using the ABS material.
7. Self-checking: when turn on the detector, it will self-check to make sure it is in the best form.
Product weight: 500g
Width: 3.25inch (8.3cm)
Carton size: 54*52*29 cm