The DP1210 is a very robust and extremely reliable Dual Power Energiser. Equally at home running on a 12 V battery or mains power. All units have 'Battery Protect' funtion to ensure you do not shorten the life of your battery. Green fence pulse indicator, orange battery low and red battery recharge light gives you a quick indication of the status of your fence. Battery extra (use for example 5916 wet battery).