diff --git a/device.go b/device.go
index ced686eb..f2ec478c 100644
--- a/device.go
+++ b/device.go
@@ -4,6 +4,9 @@ import "context"
 
 // Device ...
 type Device interface {
+	// MAC address of the local device.
+	Address() Addr
+
 	// AddService adds a service to database.
 	AddService(svc *Service) error
 
@@ -14,10 +17,10 @@ type Device interface {
 	// It removes all currently added services, if any.
 	SetServices(svcs []*Service) error
 
-	// Stop detatch the GATT server from a peripheral device.
+	// Stop detaches the GATT server from a peripheral device.
 	Stop() error
 
-	// Advertise advertises a given Advertisement
+	// Advertise advertises a given Advertisement.
 	Advertise(ctx context.Context, adv Advertisement) error
 
 	// AdvertiseNameAndServices advertises device name, and specified service UUIDs.
@@ -25,13 +28,13 @@ type Device interface {
 	// If name doesn't fit in the advertising packet, it will be put in scan response.
 	AdvertiseNameAndServices(ctx context.Context, name string, uuids ...UUID) error
 
-	// AdvertiseMfgData avertises the given manufacturer data.
+	// AdvertiseMfgData advertises the given manufacturer data.
 	AdvertiseMfgData(ctx context.Context, id uint16, b []byte) error
 
-	// AdvertiseServiceData16 advertises data associated with a 16bit service uuid
+	// AdvertiseServiceData16 advertises data associated with a 16bit service uuid.
 	AdvertiseServiceData16(ctx context.Context, id uint16, b []byte) error
 
-	// AdvertiseIBeaconData advertise iBeacon with given manufacturer data.
+	// AdvertiseIBeaconData advertises iBeacon with given manufacturer data.
 	AdvertiseIBeaconData(ctx context.Context, b []byte) error
 
 	// AdvertiseIBeacon advertises iBeacon with specified parameters.