RL-0518 doorbell 433Mhz Wireless Audio Intercom System upto 500m working distance, battery operated Audio doorphone
- High performance intercom quality
- 500m working distance in open area.
- 8 ringtones for option, 4 levels for adjusting the ringtone volume.
- One rechargeable lithium battery (18650) for the indoor unit and outdoor unit respectively.
- 18650 lithium batteries on the indoor and outdoor units can be charged alternatively through the USB port on the indoor unit.
- Indicator lights for low battery status and battery charging status.
- Wireless unlock.
- IP44 waterproof for the outdoor unit.
- Easy installation.
- Wireless digital transmission of audio signal eccludes external interference for clear voices
- Working disatance:500m (open area)
- Easy to install,no wiring problem or additional cost
- Weather proof and durable outdoor station
- One rechargeable lithium battery (18650) for the indoor unit and outdoor unit respectively
- USD port for charging battery on the indoor unit, even when the battery in the outdoor unit run out, it can be charged on the indoor unit