Retevis RT21 Walkie Talkies for Adults, 2 Way Radio Long Range, Two Way Radio Rechargeable, Handheld Radio, Portable, FRS, Durable, Heavy Duty, for Business(4 Pack) Description Features: Long range commercial walkie talkies;long antenna design; RT21 two-way radio has a longer range than other radios in the same environment Rugged walkie talkies; dust-proof and drop-proof; shock-resistant; stable reception and transmission even in harsh conditions Multi features 2 way radios with good signal and crystal sound; clear transmission and reception both indoors and outdoors Easy-to-use portable two-way radio;all walkie-talkies have been set up well; ready to use out of the box 1100 mAh rechargeable lithium battery; supports 10-12 hours of frequent use; it takes about 3 hours to fully charge VOX allows you to operate hands-free; remote emergency alarm emergency alarm will protect your safety Our walkie talkies is only FRS walkie talkies;the FCC ID is 2AAR8RETEVISRT21;our walkie talkies meet FCC rule part 95 The antennas of all RT21 walkie-talkies are not detachable Product Details: Brand: Retevis Color: Black Number of Channels: 16 Special Feature: Rugged design; stable signal; suitable for long-term use; good compatibility Age Range (Description): Adult Tuner Technology: FRS Voltage: 3.7 Volts Water Resistance Level: Not Water Resistant Product Dimensions: 1.2"D x 2.1"W x 8.9"H Number of Batteries: 4 Lithium Ion batteries required. (included) Product Dimensions: 2.1 x 1.2 x 8.9 inches Item Weight: 5.3 ounces Item model number: LYSB00JA4Z3X6-SPRTSEQIP Batteries: 4 Lithium Ion batteries required. (included) Is Discontinued By Manufacturer: No Special features: Rugged design; stable signal; suitable for long-term use; good compatibility Other display features: Wireless Color: Black Manufacturer: Retevis Country of Origin: China Date First Available: March 27, 2014