Friend, 18650 battery is not the same size as AA OR AAA battery, please be well note. If you need battery used in Power Bank, we suggest use flat head 18650 battery.
Features:
Brand new and high quality.
Support song switching.
Sound volume and language switching of voice between Chinese and English.
Voice reports number automatically when there is a call.
Support last number redial.
Support voice reminding function.
Support voice system and navigation system.
The operating distance is up to 10m.