Lot of 10 x Beehive electric heater 12V/10W + English manual! Electric heater description: beehive 12V/ 10W. A 12V car battery or truck battery. Heater beehive is 100% an environmentally friendly product! Through the use of the cermet of the heating element are not allocated any harmful substances or electromagnetic radiation. Many beekeepers have long appreciated the benefits of the heater to the hive. Electric heater allows increasing the air temperature inside the hive. And even though the temperature rises not much, but it’s enough for a significant stimulation of the queen bee to lay eggs. In this simple way, beekeepers have to early spring bribe receive strong bee colonies, or the opportunity to strains. Voltage 12V AC or DC. 10W rated power of the appliance. Product weight : 0.05 kg / 1pcs. Rated temperature of the body surface is not more than 40 ° C. Warming up to a nominal temperature of at least 10 minutes. Heater hive is designed for continuous operation. The electrical resistance of the device should be serviceable in the range of 13 to 16 ohms. When using this product, maybe a serial connection of electric heaters beehive (by type of connection lights Christmas tree garlands). To power from household 110V network in this connection it is necessary to connect at least 10 electric heaters. To power on the home network 220V in this connection it is necessary to connect at least 20 electric heaters. Comes with English manual. Please feel free to ask me if you have any question.