2 Set Electronic Accessories: 1 x Copper Plated VGA Video Card Heatsinks & 1 set x Intercom doorbel 1. Install the battery: Outdoor-bell is power supplied by 4pcs alkaline battery, easy to replace the battery, indoor-bell is power supplied by rechargeable Li-ion battery. 2. Long standby time: long standby time for outdoor-bell up to six months 3. Big and adjustable speaker, clear voice, can be used as mobile interphone. Material:ABS+Aluminum colour:gray+gold Copper Plated VGA Video Card Heatsinks: Specially designed PC VGA Video Card Fan makes your operation smooth. It extend the life of your video card by keeping it cool Dimension: ~5.5(L) x 5.5(W) x 1.2(H)cm Screw distance: 5.5cm; This quiet, high performance VGA Video Card Cooling Fan is specially designed to cool video cards, in order to optimize their performance. It extend the life of your video card by keeping it cool Copper plated PC VGA Video Card Cooler features alloy and plastic construction with a 2-pin female connector (2.0mm). Cooling down the temperature of your VGA video card with this fan. Specially designed PC VGA Video Card Fan makes your operation smooth. It is easy to install. Screw distance: 5.5cm Current: 0.1A Voltage: 12V Intercom doorbell: Long wireless distance up to 200M Easily installed with tape on the wall Outdoor-bell pair with indoor-bell by learning its code, 1 outdoor-bell can paired with N indoor-bells and no interference each other. Power mode: AAA dry battery Power supply voltage: 5 (V) Type: wireless door bell size:100 x 60 x 14.8mm Package Contents: 2 x Intercom doorbell(1 outdoor-bell and 1indoor-bells) 1 x USB Charging Cable 1 x Copper Plated VGA Video Card Heatsinks Only the above package content, other products are not included. Note: Light shooting 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.