Wireless doorbell: Get a wireless smart home security doorbell. Options: Upgrade to include a 32GB TF card and chime. Colours: Available in silver or black. Powered by: Two 18650 batteries, making the doorbell last for up to 6 months (not included). Audio: Two-way talk system to greet guests and speak to delivery people! Monitoring: Motion detection and remote live view from your devices. Smart Home Surveillance Doorbell | Silver | Living Social