A4Tech LP-15 2.4G Wireless Laser PenA4Tech LP 15 (BLACK) 2. 4G Wireless Laser Pen PRODUCT DESCRIPTION: 2. 4G Auto Channel Sort Advanced 2. 4GHz powerful wireless connection provides essentially no delays or connection conflicts. 100m Far Control Range With a range of up to 100 meters, you can enjoy the freedom to move around the room and mingle with your audience for greater impact. Low Power Indicator The presentation pointer has low power indicate and reminds you to change the battery