1. Support for USB and TF card.
2. Siren/ Record function.
3. Recharge by USB or coming with one piece rechargable lithium battery.
4. Digital Integrated circuit and Digital recording.
5. Loud voice, small distortion.
6. Superior and stable performance.
2. Siren/ Record function.
3. Recharge by USB or coming with one piece rechargable lithium battery.
4. Digital Integrated circuit and Digital recording.
5. Loud voice, small distortion.
6. Superior and stable performance.