If you need the operating instructions in an alternate format, please request it from Customer Support. Model Number KX-TG2740S 2.4GHz Expandable Cordless Phone System Handset With the handset facing you, the antenna is a narrow 2 inch long protrusion at the top right. Just below the top on the front of the handset is a shallow oval concave. This is the earpiece. The smooth surface below the earpiece is the display, its upper edge is defined by a small ridge in the center of the handset below the earpice. Below the display are 3 soft keys. Each soft key is used to select a function displayed directly above it. In the standby mode, "PLAY" is displayed above the right soft key. The right key works as the message playback key. The other 2 keys work as the line keys. On the left one is the LINE 1 key, and in the center is the LINE 2 key. "LINE 1" and "LINE 2" are displayed above them. In the center below these keys is the NAVIGATOR control. The surface of the NAVIGATOR control is concave and circular. This control has four active areas that are the 12 o'clock, 3 o'clock, 6 o'clock and 9 o'clock positions. The 12 and 6 o'clock positions are the UP and DOWN keys respectively. These are also the volume control up and down keys during a call. The 3 and 9 o'clock positions are the right and left arrow keys respectively. These are used to enter the directory list. The 3 o'clock position is often used as "Yes" key during programming. To the left of the NAVIGATOR control, a trapezoid button is the TALK button, its lower edge is defined by a small ridge. The thin button below the TALK button is the SPEAKERPHONE button. To the right of the NAVIGATOR control, a trapezoid button is the OFF button, its lower edge is defined by a small ridge. The thin button below the OFF button is the HOLD button. The HOLD button is also the CLEAR, INTERCOM or TRANSFER button. Below these buttons is the telephone keypad laid out in the conventional telephone arrangement with a "nib" on the 5 button. Immediately below the keypad are 3 thin buttons. The left-most one is the CONFERENCE button. The CONFERENCE button is also the FUNCTION button. To the right of the CONFERENCE button is the FLASH button. The FLASH button is also the CALL WAIT button. The right-most is the PAUSE button. The PAUSE button is also the REDIAL button. The indentation just below the FLASH button is the microphone. The 2 metal ridges at the bottom of the handset are the charge contacts. The handset's Speakerphone Speaker is the circular textured area on the back of the handset. The headset jack is on the left side of the handset, parallel to the TALK button. It has a rubber cover that can be opened by pulling down, and is not removable. Base unit With the base unit facing you, the antennas on the left and right sides of the unit and they can be rotated around their mounting posts so that they can be positioned pointing upwards whether the unit is on a desk or wall-mounted. The handset's charging cradle is located on the lower left corner of the unit with an indicator light to the lower right. This is about 2 inches wide and 1 inch deep. The handset is placed in the cradle with the handset's buttons facing the front of the base. The unit will beep when the handset is properly placed in the cradle for charging. The rectangular textured area, toward the back of the unit above the cradle is the speaker. To the right of the speaker is a smooth rectangular depression. This is the display. Below the display is a row of 4 thin buttons. The left-most one is the LINE 1 button with an indicator light just above it. Immediately to the right is the LINE 2 button with an indicator light just above it. The third button from the left is the HOLD button. The right-most is the CONFERENCE button. Below these buttons is a row of 5 round buttons. The left-most is the ANSWER ON button with an indicator light to the upper left. Immediately to the right is the MEMO button. To the right of the MEMO button, there are 3 other buttons. From left to right, they are MAILBOX 1, MAILBOX 2 and MAILBOX 3 buttons. When the Answering System is on, these 3 buttons control Mailbox Features such as recording and playing back messages. In the center below these buttons is the NAVIGATOR control, which is a large oval with an oval depression in the center. This control has four active areas that are the 12 o'clock, 3 o'clock, 6 o'clock and 9 o'clock positions. The 12 and 6 o'clock positions are the UP and DOWN keys respectively. These are also the volume control up and down keys during a call. The 3 and 9 o'clock positions are the right and left arrow keys respectively. These are used to enter the directory list. The 3 o'clock position is often used as "Yes" key during programming. To the upper left of the NAVIGATOR control is the ERASE button, and to the upper right is the STOP button. The STOP button is also the EXIT button. To the lower left of the NAVIGATOR control is the FUNCTION button, and to the lower ri...