Key Features

Capacity: 16 
Channel Spacing: 25KHz 
Operated Voltage: 3.7 V 
Battery: H-1500MAh Li-ion 
Battery Life(5-5-90 duty cycle): About 8 hours 
Frequency Stability: ± 2.5ppm 

Antenna Impedance: 50Ω 
Dimensions (L× W× H) (with battery，without antenna): 110× 50× 32 mm
Weight (with battery/antenna): 198g 170 g 
Communication Range: about 6km 

Transmitter 
RF Power Output: 3W 
Modulation: F3E 
Spurious Emission: ≤ 65dB 
FM Noise: ≤ -45dB(W) ≤ -40dB (N) 
Audio Distortion: ≤ 5% 
Transmitting Current: ≤ 1.3A

Receiver 
Sensitivity (12dB SINAD): ≤ 0.20 uV 
Selectivity: 55dB/50dB 
Intermodulation: ≥ 65dB 
Adjacent Channel Selectivity: ≥ 60dB 
Spurious Response: ≥ 60dB 
FM Noise: 45dB/40dB 
Audio Power Output: 1000mW 
Audio Distortion: ≤ 5% 
Standby Current: ≈ 15mA (with battery save on)

Packing Content:

1 x BAOFENG BF-666S UHF 400-470Mhz
1 x 7.4v 1500mAh Battery
1 x high gain SMA female Antenna.
1 x Belt Clip.
1 x ENG Manual
1 x Charger with 220V Only (Buyer from other country maybe need plug adaptor) 
1 x WRIST STRAP