As you have asked about the specifications of the Tejas jet by Hindustan Aeronautical Limited (HAL) and Defence research and Development Organization (DRDO), I am giving you information about it, check below for the details

It is an Indian single-seat, single-jet engine, multi-role light fighter jet.
It is a result of the Light Combat Aircraft (LCA) programme.
It is manufactured by HAL.
Tejas is the second supersonic fighter.

Specifications:

General characteristics

Crew: 1
Length: 13.20 m (43 ft 4 in)
Wingspan: 8.20 m (26 ft 11 in)
Height: 4.40 m (14 ft 9 in)
Wing area: 38.4 m² (413 ft²)
Empty weight: 6,560 kg (14,300 lb)
Loaded weight: 9,500 kg (20,944 lb)
Max. takeoff weight: 13,200 kg (29,100 lb)
Powerplant: 1 × General Electric F404-GE-IN20 turbofan
Dry thrust: 53.9 kN[164] (12,100 lbf)
Thrust with afterburner: 89.8 kN (20,200 lbf)
Internal fuel capacity: 2,458 kg
External fuel capacity: 2 x 1,200-litre drop tank at inboard, 1 x 725-litre drop tank under fuselage

Performance

Maximum speed: Mach 1.8 (2,205 km/h) for FOC version; Mach 1.6 (2,000 km/h) for IOC version;

Range: 3,000 km (1,620 nmi, 1,864 mi)
Combat radius: 500 km (270 nmi, 311 mi)
Ferry range: 1,700 km (1,056 mi)
Service ceiling: 15,240 m (50,000 ft)
Wing loading: 247 kg/m² (50.7 lb/ft²)
Thrust/weight: 1.07
g-limits: +8/−3.5 g