Rated voltage: 3v Installation: wireless For: Such as electric telescopic door remote control, road gate remote control, alarm remote control and so on. Wireless transmission distance: 50-150 (m). (open space) Frequency:868MHz, 868.3MHz Usage:Fifteen seconds clone, can be used directly after cloning Compatibility list: hsm2 868 ,hsm4 868, hs1 868,hs2 868,hs4 868, hse2 868,hse4 868 hsz1 868,hsz2 868, hsp4 868,hsp4-c 868, hsd2-A 868,hsd2-c 868 Digital D382 868 Digital D384 868 Digital D302 868 Digital D304 868 Digital D313 868 Digital D321 868 Digital D323 868 131 868 Colour: black Material: ABS Size: 5.8 x 3cm Package Contents: 3 x Remote Control Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.